void setup(){
size(700,700);  

}

void draw(){
background(255,255,255);
int ix = (int)(random(150));
int iy = (int)(random(150));
line(mouseX-ix,mouseY-iy,mouseX+ix,mouseY+iy );
line(mouseX-ix,mouseY+iy,mouseX+ix,mouseY-iy );
rect(mouseX-ix,mouseY-iy,10,10);
rect(mouseX+ix,mouseY+iy,10,10);
rect(mouseX-ix,mouseY+iy,10,10);
rect(mouseX+ix,mouseY-iy,10,10);
}