diff --git a/du7/README.md b/du7/README.md
new file mode 100644
index 0000000..79a2d67
--- /dev/null
+++ b/du7/README.md
@@ -0,0 +1,16 @@
+# Snake Master
+
+Implement Snake game.
+
+Make the game to pass the automatic tests and make the game to be nice.
+
+## Files
+
+Please do not change file names.
+
+- `snake.h`: you implementation should follow this header.
+- `snake.c`: implemement the game according to the documentation in header file  in this file to pass automatic tests.
+- `Makefile`: rules to build the game.
+- `main.c`: trivial main function that runs the game, modify this file to change the appereance of the game and the initial state.
+- `world.c`: world game loop and ASCII graphics library (do not change).
+- `world.h`: world library interface (do not change).
diff --git a/du7/snake.c b/du7/snake.c
new file mode 100644
index 0000000..e937a56
--- /dev/null
+++ b/du7/snake.c
@@ -0,0 +1,112 @@
+#include "snake.h"
+#include <stdlib.h>
+#include <curses.h>
+
+//void freeAll(struct snake* prvok);
+
+struct snake* add_snake(struct snake* snake,int x,int y){
+    
+    struct snake* head = calloc(1,sizeof(struct snake));
+    head->x = x;
+    head->y = y;
+    head->next = snake;
+
+    return head;
+}
+
+struct snake* remove_snake(struct snake* snake){
+    if(!snake->next&&!snake)
+        return NULL; 
+
+    struct snake* last = snake;
+    struct snake* secondLast = snake; 
+
+    while(1){
+        if(!last->next){
+            free(last);
+            secondLast->next=NULL; 
+            return snake;
+        }
+        secondLast=last;
+        last=last->next;
+    }
+}
+
+
+void free_snake(struct snake* sn){
+    struct snake* this = sn;
+    
+    while(this){
+        struct snake* next = this->next;
+        free(this);
+        this = next;
+    }
+}
+
+/*
+void freeAll(struct snake* prvok){
+    if(!prvok) 
+        break;
+
+    else if(prvok->next)
+        freeAll(prvok->next); 
+ 
+    free(prvok); 
+}*/
+
+
+int is_snake(struct snake* snake,int x,int y){
+    
+    struct snake* this = snake;
+
+    while(this){
+        if(this->x==x && this->y==y)
+            return 1;
+
+        this = this->next;
+    }
+    return 0;
+}
+//Spojkový zoznam =============================> celá hra
+
+
+int step_state(struct state* st){
+
+	int nx = (st->snake->x + st->sx);
+    int ny = (st->snake->y + st->sy);
+    
+    if(is_snake(st->snake,nx, ny))
+        return END_SNAKE; 
+//
+    for(int i = 0;i < FOOD_COUNT; i++){
+        if(nx==st->foodx[i]&&ny==st->foody[i]){
+            st->foody[i]=-1;
+            st->foodx[i]=-1;
+            
+            add_snake(st->snake, nx, ny);
+        }
+    }
+    
+    int is_all_eaten=1;
+    for(int i = 0;i < FOOD_COUNT; i++){
+        if(st->foodx[i]>=0){
+            is_all_eaten = 0;
+            break;
+        }
+    }
+    
+    if(is_all_eaten)
+        return END_FOOD;
+// 
+    
+    if(nx<0||ny<0||nx>=COLS||ny>=LINES)
+        return END_WALL;
+//
+
+    if(st->snake->x != nx && st->snake->y != ny){
+        remove_snake(st->snake);
+        add_snake(st->snake, nx, ny);
+    }
+
+    return END_CONTINUE;
+}
diff --git a/du7/snake.h b/du7/snake.h
new file mode 100644
index 0000000..4d1ff74
--- /dev/null
+++ b/du7/snake.h
@@ -0,0 +1,114 @@
+#ifndef snake_h_INCLUDED
+#define snake_h_INCLUDED
+
+// Number of food items on the plane
+#define FOOD_COUNT 5
+
+/**
+ * One part of the snake;
+ * 
+ * The snake is a linked list;
+ */
+ 
+struct snake {
+    // x position of the snake part
+    int x;
+    // y position of the snake part
+    int y;
+    // Pointer to the next snake part.
+    // The last part of the snake has NULL pointer to the next part.
+    struct snake* next;
+};
+
+// End game reason constants, return value of step_state
+enum endgame {
+    // Continue the game
+    END_CONTINUE = 0,
+    // Snake hit a wall
+    END_WALL,
+    // Snake hit itself
+    END_SNAKE,
+    // No food left
+    END_FOOD,
+    // Other reason to end
+    END_USER
+};
+
+/**
+ * State of the game.
+ * 
+ * The state consists of the snake, its speed and food on the plane.
+ * 
+ * The snake is a linked list of snake parts.
+ * 
+ * Speed vector is a vector added to the last head position to create a new head.
+ * 
+ * Food are points on the plane. Food with negative coordinates meads food is already eaten.
+ */
+ 
+struct state {
+    // Snake as a linked list
+    struct snake* snake;
+    // X of the food positions
+    int foodx[FOOD_COUNT];
+    // Y of the food positions
+    int foody[FOOD_COUNT];
+    int sx;
+    int sy;
+    int width;
+    int height;
+};
+
+/**
+ * Add a new snake part with given position. The new snake part becomes the new head.
+ *
+ * @param head of the snake.
+ * @param x coordinate of the new head;
+ * @param y coordinate of the new head.
+ * @return new head of the snake.
+ */
+struct snake* add_snake(struct snake* snake,int x,int y);
+
+/**
+ * Remove the last snake part.
+ * The last snake part  should always have NULL next pointer.
+ *
+ * @param head of the snake.
+ * @return new head of the snake.
+ */
+struct snake* remove_snake(struct snake* snake);
+
+/**
+ * Finds out if given coordinates are part of the snake.
+ * @param snake
+ * @param x coordinate to search in snake
+ * @param y coordinate to search in snake
+ * @return True, if there is a snake part with coordinates x,y. False otherwise
+ *
+ */
+int is_snake(struct snake* snake,int x, int y);
+/**
+ * Remove and free each snake part;
+ * @param head of the snake.
+ */
+void free_snake(struct snake* sn);
+/**
+ * Change game state.
+ *
+ * The function shoud calculate new posision of the snake head
+ * from the current position and speed vector.
+ * Then it should modify snake parst  or food coordinates according to the rules:
+ * 
+ * - If the new position is on the snake, end the game, return END_SNAKE.
+ * - If the new position is on the food, mark food as eaten
+ *   (set its coordinates to -1) and add new snake part on the position of the food. If there is no food left, return END_FOOD. else return END_CONTINUE.
+ * - If the new position is on the plane, add new snake part on the new position and remove the last part of the snake, return END_CONTINUE.
+ * 
+ * @param current state of the game
+ * @return reason to end the game according to enum endgame.
+ */
+int step_state(struct state* state);
+
+
+#endif // snake_h_INCLUDED
+
diff --git a/du7/world.c b/du7/world.c
new file mode 100644
index 0000000..a45c109
--- /dev/null
+++ b/du7/world.c
@@ -0,0 +1,198 @@
+#include "world.h"
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+int TIMEOUT;
+
+void abort_game(const char* message){
+    endwin();
+    puts(message);
+    exit(1);
+}
+
+void check_bounds(const char* source,int x, int y){
+    char msg[200];
+    if (x < 0 || x >= COLS){
+        sprintf(msg,"%s:: width %d is out of bounds (0,%d)",source,x,COLS);
+        abort_game(msg);
+    }
+    if (y < 0 || y >= LINES){
+        sprintf(msg,"%s:: height %d is out of bounds (0,%d)",source,y,LINES);
+        abort_game(msg);
+    }
+}
+
+void clear_screen(){
+    // Clear screen
+    mvaddch(0,0,' ');
+    int screenchars = LINES*COLS;
+    for (int j = 1; j < screenchars;j++ ){
+        addch(' ');
+    }
+}
+
+void game_speed(int value){
+    if (value < 0){
+        abort_game("world_seed:: cannot be negative\n");
+    }
+    TIMEOUT =value;
+}
+
+void set_message(const char* message,int x,int y) {
+    int l = strlen(message);
+    for (int i = 0; i < l; i++){
+        check_bounds("set_message",x+i,y);
+        set_cell(message[i],x+i,y);
+    }
+}
+
+void assert_message(int event,const char* message){
+    if (event == 0){
+        abort_game(message);
+    }
+}
+
+
+void set_cell(int character,int x,int y) {
+    check_bounds("set_cell",x,y);
+    set_color_cell(character,x,y,COLOR_WHITE,COLOR_BLACK);
+}
+
+void set_color_cell(int character,int x,int y,short front_color,short back_color){
+    check_bounds("set_color_cell",x,y);
+    if (has_colors()){
+        int pair = COLOR_COUNT * front_color + back_color; 
+        attron(COLOR_PAIR(pair));
+        mvaddch(y,x,character);
+        attroff(COLOR_PAIR(pair));
+    }
+    else{
+        mvaddch(y,x,character);
+    }
+}
+
+int start_world(void* (*init_game)(),int (*world_event)(struct event* event,void* game),void (*destroy_game)(void*)){
+    srand(time(NULL));
+    int r = 1;
+    // Speed global variable
+    TIMEOUT = 100;
+    if (initscr() == NULL){
+        // TODO Which Error?
+        puts("Curses Error.");
+        return -1;
+    }
+    noecho(); // Nevypisuj vstup na obrazovku
+    cbreak(); // Zabudni starý vstup
+    nodelay(stdscr,TRUE); // Nečakaj na stlačenie
+    keypad(stdscr,TRUE); // Aktivuje šípky
+    curs_set(FALSE); // Neviditeľný kurzor
+    /* Get all the mouse events */
+    mousemask(ALL_MOUSE_EVENTS, NULL);
+    MEVENT mouse_event;
+    if (has_colors()){ // Zistenie či terminál podporuje farby
+        start_color();
+        for (int i = 0; i < COLOR_COUNT;i++){
+            for (int j = 0; j < COLOR_COUNT;j++){
+                init_pair(i * COLOR_COUNT + j, i,j);
+            }
+        }
+    }
+    else {
+        puts("No colors!\n");
+    }
+    void* game = NULL;
+    if (init_game != NULL){
+         game = init_game();
+         assert_message(game != NULL,"init_game:: should return non null pointer");
+    }
+    timeout(TIMEOUT);
+    // Initial step
+    struct event event;
+    memset(&event,0,sizeof(struct event));
+    event.height = LINES;
+    event.width = COLS;
+    event.type = EVENT_START;
+    clock_t start_time = clock();
+    clock_t last_timeout = start_time;
+    clock_t next_timeout = last_timeout + TIMEOUT;
+    event.time_ms = start_time;
+    // Start event
+    r = world_event(&event,game);
+    refresh();
+    while (!r) {
+        memset(&event,0,sizeof(struct event));
+        event.height = LINES;
+        event.width = COLS;
+        event.key = getch();
+        // No key was pressed
+        if (event.key == ERR){
+            event.type = EVENT_TIMEOUT;
+            last_timeout = clock();
+            next_timeout = last_timeout + TIMEOUT;
+        }
+        // Mouse event
+        else if (event.key == KEY_MOUSE ){
+            event.type = EVENT_MOUSE;
+            if(getmouse(&mouse_event) == OK){
+                event.mouse_x = mouse_event.x;
+                event.mouse_y = mouse_event.y;
+                if(mouse_event.bstate & BUTTON1_PRESSED){
+                    event.mouse_left = 1;
+                }
+                if(mouse_event.bstate & BUTTON2_PRESSED){
+                    event.mouse_middle = 1;
+                }
+                if(mouse_event.bstate & BUTTON3_PRESSED){
+                    event.mouse_right = 1;
+                }
+            }
+        }
+        else if (event.key == KEY_RESIZE) {
+            event.type = EVENT_RESIZE;
+        }
+        else{
+            event.type = EVENT_KEY;
+            if (event.key == 27){
+                int k = getch();
+                if (k == -1){
+                    // Esc Was pressed
+                    event.type = EVENT_ESC;
+                }
+                else {
+                    // Alt was pressed
+                    event.key = k;
+                    event.alt_key = 1;
+                }
+            }
+        }
+        // Draw new world
+        event.time_ms = clock();
+        r = world_event(&event,game);
+        refresh();
+        event.time_ms = clock();
+        // set new timeout
+        int nt = next_timeout - event.time_ms;
+        //printf("%d\n",nt);
+        if (nt > 0){
+            timeout(nt);
+        }
+        else {
+            timeout(TIMEOUT);
+            next_timeout = event.time_ms + TIMEOUT;
+        }
+    }
+    memset(&event,0,sizeof(struct event));
+    event.height = LINES;
+    event.width = COLS;
+    event.type = EVENT_END;
+    event.time_ms = clock();
+    world_event(&event,game);
+    if (destroy_game != NULL){
+        destroy_game(game);
+    }
+    endwin();
+    return r;
+};
diff --git a/du7/world.h b/du7/world.h
new file mode 100644
index 0000000..e7a3fdb
--- /dev/null
+++ b/du7/world.h
@@ -0,0 +1,122 @@
+#ifndef _WORLD_H_
+#define _WORLD_H_
+
+#include <curses.h>
+
+/**
+ * World represented as a rectangular matrix of colorful characters.
+ * 
+ * Point [0,0] is displayed the upper left corner of the screen.
+ * 
+ */
+
+enum event_type {
+    EVENT_START,
+    EVENT_TIMEOUT,
+    EVENT_KEY,
+    EVENT_MOUSE,
+    EVENT_RESIZE,
+    EVENT_ESC,
+    EVENT_END,
+};
+
+struct event {
+    /**
+     * Last width of the screen.
+     */
+    int width;
+    /**
+     * Last height of the screen.
+     */
+    int height;
+    /**
+     * Last pressed key or Curses event.
+     *
+     * Special event  values:
+     * ERR if timeout,
+     * KEY_RESIZE if screen resize
+     * KEY_EVENT, other event,
+     * KEY_MOUSE, mouse clicked
+     *
+     * Key values:
+     *
+     * ' ' Space
+     * KEY_DOWN Arrow down
+     * KEY_UP Arrow up
+     * KEY_LEFT Arrow left
+     * KEY_RIGHT Arrow right
+     * KEY_A1 Upper left of keypad
+     * KEY_A3 Upper right of keypad
+     * KEY_B2 Center of keypad
+     * KEY_C1 Lower left of keypad
+     * KEY_C3 Lower right of keypad
+     *
+     * KEY_ENTER
+     * KEY_BACKSPACE
+     */
+    int key;
+    int alt_key;
+    enum event_type type;
+    int mouse_x;
+    int mouse_y;
+    int mouse_left;
+    int mouse_right;
+    int mouse_middle;
+    long int time_ms;
+};
+
+/**
+ * Sets cell to a state.
+ * @param event 
+ * @param x coordinate of cell
+ * @param y coordinate of cell
+ * @param new state of the cell
+ */
+void set_cell(int character,int x,int y);
+
+/**
+ * COLOR_BLACK   0
+ * COLOR_RED     1
+ * COLOR_GREEN   2
+ * COLOR_YELLOW  3
+ * COLOR_BLUE    4
+ * COLOR_MAGENTA 5
+ * COLOR_CYAN    6
+ * COLOR_WHITE   7
+ */
+
+#define COLOR_COUNT 8
+
+void set_color_cell(int character,int x,int y,short front_color,short back_color);
+
+
+/**
+ *
+ * @param event
+ * @param number of commandline arguments
+ * @param init_world
+ * @param destroy_world
+ *
+ * void init_world(struct event* w);
+ * Initializes user state.
+ * Free user state.
+ * @param event
+ */
+
+int start_world(void* (*init_game)(),int (*world_event)(struct event* event,void* game),void (*destroy_game)(void* game));
+/**
+ * Set timeout interval in miliseconds
+ */
+void game_speed(int value);
+
+/*
+ * Prints a message in screen on a position x,y
+ */
+
+void set_message(const char* message,int x,int y);
+/*
+ * Clears screen
+ */
+void clear_screen();
+
+#endif