int x=0;
int y=100;
int i=0;
int r = 1;
float r1 =0;
float r2 = 0;

void setup() {
  size(400,400);
  background(200,0,0);
  ellipseMode(CENTER_DIAMETER);
  rectMode(CENTER_DIAMETER);
}

void loop() {
  background(200,0,0);
  noStroke();
  
  /*
    elli(i,i,50,50); //(i*2)%400 mod
    stroke(255,255,255);
    lin1(10,20,100,120+i);
    i=i+(5*r);
    
   if (i == 400)  r = -1;
    if (i== -5) r = 1;
 */
 
    r1 = (random(4))-mouseX;
    r2 = (random(4))-mouseY;
 
    cir2(r,r2,30,30);
  
    cir1(i,mouseY,30,30);
    stroke(255,255,255);
 
    cir(mouseX,mouseY,30,30);
    i=i+(5*r);
    
    if (i == 100)  r = -1;
    if (i== -5) r = 1;
    
}

void cir(float x, float y, float rad, float rad2){

ellipse(x,y,rad,rad2);
ellipse(mouseX -random (x/2),mouseY - random (y/4),rad,rad2);
}

void cir1(float x, float y, float rad, float rad2){

ellipse(x,y,rad,rad2);
}

void cir2(float x, float y, float rad, float rad2){

ellipse(x,y,rad,rad2);
}