I am trying to move a sun along a convex arc of 180 degrees.

The timing should be based on second() so that the movement occurs every 3 degrees at each second...any ideas...

// initiate and assign all variables
float angle= 0.0;
float offset=60;
float scalar=200;


void setup() {
  size(1200, 800);
  background(120, 50, 230);
  strokeWeight (2);
  frameRate (30);

//draw and move sun incrementally everytime the loop is called
for (float angle=0; angle<180; angle+=3) {
  float speed=second();
  background(120, 50, 230);
  fill(255, 255, 0);
  noStroke();
  float x=width/2+scalar*sin(radians(angle)-speed);
  float y=height/2+scalar*cos(radians(angle)-speed);
  ellipse(x, y, 100, 100);
}
}