float x; float y;float z;
void setup(){
 size(500,500);
 background(255,255,255);
 x=100; y=5; z=5;
}

void draw(){
 background(255,255,255);
 strokeWeight(5);
 stroke(0,0,0);
 line(300,350,200,350);
 line(200,350,250,150);
 line(250,150,300,350);
 fill(250,20,20,50);
 ellipse(250,500,600,300);
 stroke(250,0,0);
 strokeWeight(10);
 ellipse(250,150,x,x);
  x=x-1.5;
 if(x==0 || x<0){
   x=100;
}
  
}