int ballx;
int x;
int y;
int x_direction;
int y_direction;

void setup(){

  size(300,300);
   x=0;
   y=0;
  x_direction=3;
  y_direction=3;

}

void loop(){

  background(0);
//ray  
  //x=x+x_direction;
 // y=y+y_direction;
  
  //if(x>150){
  //fill(255,255,0);
  //stroke(255,255,0);
 // ellipse(x,y,5,5);
  //}
  
  //println(x);
  
  //if(x>300){
   //x =150;
  //}
  
  //if(y>300){
   //y =150;
  //}
  

  
//rightline 

  strokeWeight(1); 
  stroke(255);
  for(int i=0; i<150; i=i+10){

    line(i+150,150-i,i+150,i+150);


 }

//leftline
  for(int j=-10; j<150; j=j+10){

    line(j,j,j,300-j);
  }

//maru
   ellipseMode(CENTER_DIAMETER);
   fill(255);
   ellipse(ballx,height/2,30,30);

}

void mouseDragged(){
  ballx = mouseX;
  

}