#include "GameBoy.h"
GameBoy gb;

int xFood = 3;int yFood = 3;
int x = 5;    int y = 5;

int lenTail = 0; 
int xTail[8*8*2];
int yTail[8*8*2];
int xSpeed=0; 
int ySpeed=-1; 
void setup() {
  gb.begin(0);
  Serial.begin(9600);
}
void loop() {// Serial.println(gb.getKey());
  x+=xSpeed; y+=ySpeed; 
  if(y>=16) y=0; if(y<0) y=15;
  if(x>=8) x=0; if(x<0) x=7;
   if(x==xFood and y==yFood){
   xTail[lenTail] = x;
    yTail[lenTail] = y;
    lenTail++; 
    xFood=random(8); yFood=random(8*2); 
  }
    for(int i=0; i<lenTail-1; i++){
    xTail[i]=xTail[i-1]; yTail[i]=yTail[i-1]; 

    }
  for(int i=0; i<lenTail; i++){
    gb.setLed(xTail[i],yTail[i],true);
  }
  gb.clearDisplay();
  gb.setLed(xFood,yFood,true);
  gb.setLed(x,y,true);//вімкнути піксель за кординатами
  if(gb.getKey()==5) {xSpeed= 1; ySpeed= 0;} 
  if(gb.getKey()==4) {xSpeed=-1; ySpeed= 0;}
  if(gb.getKey()==6) {ySpeed= 1; xSpeed= 0;} 
  if(gb.getKey()==3) {ySpeed=-1; xSpeed= 0;} 
  delay(200);
}