int radius = 50, directionX = 1, directionY = 1;
float y = 250, x = 250, speed = 3;
float rotation = .1;
float limits1=0.7, limits2=5.3;
float stop=limits2, start=limits1;
boolean isMove = true;
float up=-4, down=4, left=-4, right=4;
float xDir=0, yDir;
boolean is = false;
int[]array=new int[8];
void setup()
{
  size (800, 600);
  noStroke();
  smooth();
  fill(255, 255, 0);
  ellipseMode(RADIUS);
  // frameRate(20);
}


void draw()
{
  background(0);

  stop+=rotation;
  start-=rotation;
  if (stop<=limits2||stop>limits2+0.7) {
    rotation *=-1;
  }
  x+=xDir;
  y+=yDir;
  if (x>width)x=0;
  if (x<0)x=width;
  if (y<0)y=height;
  if (y>height)y=0;
//    if (w && n) {
//      //start = 0.7-2*PI/3;
//      //stop = 5.3-2*PI/3;
//      arc(x, y, radius, radius, start-2*PI/3, stop-2*PI/3);
//    }
//    else if (w && s) {
//      //start = 0.7-2*PI/3-PI/2;
//     // stop = 5.3 -2*PI/3-PI/2;
//      arc(x, y, radius, radius, start -2*PI/3-PI/2, stop -2*PI/3-PI/2);
//    }
//    else if (e && s) {
//      //start =0.7-2*PI/3-PI;
//      //stop = 5.3-2*PI/3-PI;
//       arc(x, y, radius, radius, start-2*PI/3-PI, stop-2*PI/3-PI);
//    }
//    else if (e && n) {
//      //stop = 5.3-PI/3+0.5;
//      //start = 0.7-PI/3+0.5;
//       arc(x, y, radius, radius, start-PI/3+0.5, stop-PI/3+0.5);
//    }
    if (xDir == -4 && yDir == 0) {
     //start = 0.7-PI;
     // stop = 5.3-PI;
       arc(x, y, radius, radius, start-PI, stop-PI);
    }
    else if (xDir == 0 && yDir == -4) {
      //start=0.7-PI/2;
      //stop = 5.3-PI/2;
       arc(x, y, radius, radius, start-PI/2+0.1, stop-PI/2+0.1);
    }
    else if (xDir == 0 && yDir == 4) {
     // start=0.7+PI/2+0.1;
     // stop =5.3+PI/2+0.1;
      arc(x, y, radius, radius, start+PI/2+0.1, stop+PI/2+0.1);
 
   }else if((xDir==0&&yDir==0)||(xDir==4&&yDir==0)){
     arc(x, y, radius, radius, start, stop);
   }
}
void keyPressed() {
  switch(key) {
  case'w':
  case'W':
    yDir=up;
    xDir=0;
    break;
  case'a':
  case'A':
    xDir=left;
    yDir=0;
    break;
  case's':
  case'S':
    yDir=down;
    xDir=0;
    break;
  case'd':
  case'D':
    xDir=right;
    yDir=0;
    break;
  }
}
void keyReleased() {
  switch(key) {
  case'w':
  case'W':
    yDir=0;
    break;
  case'a':
  case'A':
    xDir=0;
    break;
  case's':
  case'S':
    yDir=0;
    break;
  case'd':
  case'D':
    xDir=0;
    break;
  }
}

if (xDir != 0 || yDir != 0)
{
    prevX = xDir;
    prevY = yDir;
}