Code Sketch

import scala.util.Random //> import scala.util.Random

clear()
setBackground(black)
invisible()   // hideTurtle ki jagah ye use karo

def randomColor() = {
  Color(Random.nextInt(255), Random.nextInt(255), Random.nextInt(255))
} //> def randomColor(): java.awt.Color

def galaxy() = {
  for (i <- 1 to 300) {
    setPenColor(randomColor())
    forward(i * 2)
    right(59)
  }
} //> def galaxy(): Unit

animate {
  clear()
  setBackground(black)
  home()
  for (i <- 1 to 20) {
    galaxy()
    right(18)
  }
} //> val res10: java.util.concurrent.Future[edu.umd.cs.piccolo.activities.PActivity] = net.kogics.kojo.util.FutureResult@4de7e78b