week09

void setup(){
   size(600,200);
}
int a=20;
int diff=1;
void draw(){
    background(0);
    fill(#FAE600);
    arc(50,50,80,80, radians(45),radians(315),PIE);
    a+=diff;
    if(a>60) diff=-1;
    if(a<=0) diff=+1;
}