Spon & Fork In Function.

float instrumentY = 130;

void setup () {
  size (450, 500);
}
void draw () {
  background (255);
  instrument_hight (instrumentY);
  instrumentY = instrumentY -1;
  if (instrumentY <= height-400) {
  instrumentY = 200;
  }
}

void instrument_hight (float instrumentY) {
  float instrumentX = 100;
  background (255);
  fill (0, 0, 255);
  stroke (0, 0, 255);
  strokeWeight (30);

  ellipse (instrumentX, instrumentY, 80, 160);
  line (instrumentX, instrumentY, instrumentX, height-100);
  line (instrumentX*3, instrumentY-80, instrumentX*3, (instrumentY*2)-80); //fork
  line ((instrumentX*3)+40, instrumentY-80, (instrumentX*3)+40, height-100);
  line ((instrumentX*3)+80, instrumentY-80, (instrumentX*3)+80, (instrumentY*2)-80);
  line (instrumentX*3, (instrumentY*2)-80, (instrumentX*3)+80, (instrumentY*2)-80);
}