float angle = 0.0;
float a = 0.05;
float b = 100;
float c = 82;

void setup() {
  size(500,500);
  noStroke();
  smooth();
}

void draw() {
  background(255);
  fill(123,167);
  float x = b+cos(angle)*c;
  rect(x,150,x,x);
  fill(45,231);
  float x1 = x+cos(angle)*c/2;
  ellipse(x1,250,100,100);
  angle += a;
}