looper
@author
int num = 100;
void setup(){
size(500, 500);
noStroke();
background(0);
}
void draw(){
fill(0, 30);
rect(0, 0, width, height);
fill(255, 140, 0, 50);
translate(width / 2, height / 2);
rotate(frameCount * 0.2);
float radious = map(abs(sin(frameCount * 0.01)), 0, 1, 10, 200);
float diameter = map(radious, 10, 200, 1, 100);
for(int i = 0; i < num; i++){
float maxRadian = map(abs(sin(frameCount * 0.01)), 0, 1, PI / 16.0, TWO_PI);
float radian = map(i, 0, num, 0, maxRadian);
ellipse(radious * cos(radian), radious * sin(radian), diameter, diameter);
}
}