Animation Topic lab 2

int movex=75, movey=-10;
void setup() {
  size(323, 200);
  background(150, 50, 25);
  frameRate(1);
fill(200);
draw();
}
int a = 0;
void draw(){
  a = a + 1;
  if(a == 1){
    draw_2();
  line(65+movex, 150+movey, 80+movex, 110+movey);
}
  if(a == 2){
    draw_2();
line(65+movex, 150+movey, 80+movex, 110+movey);
line(95+movex, 150+movey, 80+movex, 110+movey);
}
  if(a == 3){
    draw_2();
line(65+movex, 150+movey, 80+movex, 110+movey);
line(95+movex, 150+movey, 80+movex, 110+movey);
line(72+movex, 130+movey, 87+movex, 130+movey);
}
if(a == 4){
    draw_2();
    a = 0;
}
}
void draw_2(){
  background(150, 50, 25);
  fill(200);
rect(20+movex, 25+movey, 140, 150);
line(25+movex, 40+movey, 25+movex, 70+movey);
line(45+movex, 50+movey, 45+movex, 60+movey);
line(40+movex, 55+movey, 50+movex, 55+movey);
line(65+movex, 40+movey, 65+movex, 70+movey);
line(90+movex, 50+movey, 100+movex, 50+movey);
line(90+movex, 60+movey, 100+movex, 60+movey);
line(120+movex, 40+movey, 140+movex, 40+movey);
line(140+movex, 40+movey, 140+movex, 55+movey);
line(120+movex, 55+movey, 140+movex, 55+movey);
line(120+movex, 55+movey, 120+movex, 70+movey);
line(120+movex, 70+movey, 140+movex, 70+movey);
}