int t=0;
int counter = 0;
int dir =80;// dir direction , counting up or counting down in this case.



void setup() {
  size(1500, 400);
  background(0);
  Float a=0.0;
  float inc=TWO_PI/120.0;
  println("The inc = " + inc);
  //stroke(255, 0, 0);
}

void draw() {
  fill( random(255), random(255), random(255), random(255));


  counter+=dir;//add 1 to the value of counter 0, so it is gonna be 1 after the first time it runs.
  t+=1;
  ellipse (t, 100+counter, 5, 5);
  if (counter > 150 || counter < -20) {
    //counter=0;
    dir=-dir;
    println("RESET!!! TO 0 -----");
   counter+=dir;//add 1 to the value of counter 0, so it is gonna be 1 after the first time it runs.
  t+=1;
 rect(t, 100+counter, 5, 5);
  if (counter > 150 || counter < -5) {
    //counter=0;
    dir=+dir;
    println("RESET!!! TO 0 -----");
  }
}
}