// Variance
float posX = 0.0;   //position X
float posY = 0.0;   //position Y
float dia = 20.0;   // diameter
int count;  //counter 

void setup() {   // Initialize
  size(200, 200);      //window
  background(0, 0, 0); //black
  noStroke();    //lineless
}

void draw() {    // main loop
  count++;  //increment
  
  posX = random(20.0, 180.0); //position X
  posY = random(20.0, 180.0); //position Y 
  if (count == 60 ) {  //1s
    fill(0, 255, 0);  //circle color
    ellipse(posX, posY, dia, dia);  //circle
    count = 0;  //reset
  }
}