four moving circles
@author
PVector[] vertices;
float pos = 75;
void setup(){
size(500, 500);
fill(0, 75, 77);
stroke(0, 206, 209);
strokeWeight(30);
vertices = new PVector[4];
vertices[0] = new PVector(pos, pos);
vertices[1] = new PVector(pos, -pos);
vertices[2] = new PVector(-pos, -pos);
vertices[3] = new PVector(-pos, pos);
}
void draw(){
background(255);
translate(width / 2, height / 2);
float amt = sin(HALF_PI * (frameCount % 100 / 100.0));
for(int i = 0; i < vertices.length; i++){
int j = i != vertices.length - 1 ? i + 1: 0;
PVector v = PVector.lerp(vertices[i], vertices[j], amt);
ellipse(v.x, v.y, 75, 75);
}
}