They are already in functions the code just needs reorganising. If you press Ctrl/T (Windows / Linux) or Cmd/t (OSX) Processing will tidy up the code and it will look like this.

1. void setup() {
2.   size(200, 200);
3.   ellipseMode(CENTER);
4.   rectMode(CENTER);
5. }
6. void draw() {
7.   background(0);
8.   translate(X, Y);
9.   rotate(r=(r+(t?.1:0))%TWO_PI);
10.   stroke(39, 242, 29);
11.   fill(255);
12.   triangle(0, 0, 30, 80, -30, 80);
13.   fill(39, 242, 29);
14.   ellipse(0, 5, 60, 60);
15.   stroke(127);
16.   line(10, 20, -10, 20);
17.   fill(mouseX, 0, mouseY);
18.   ellipse(-19, 0, 16, 25);
19.   ellipse(19, 0, 16, 25);
20.   stroke(255);
21.   line(-10, 80, -20, 100);
22.   line(-20, 100, -10, 60);
23.   line(10, 80, 20, 100);
24.   line(20, 100, 10, 50);
25. }
26. void keyPressed() {
27.   if (key==CODED)
28.   {
29.     if (keyCode==UP)Y--;
30.     if (keyCode==DOWN)Y++;
31.     if (keyCode==RIGHT)X++;
32.     if (keyCode==LEFT)X--;
33.   }
34.   if (key=='t') {
35.     t=!t;
36.   }
37. }
38. float X=100, Y=100, r;
39. boolean t;

you could also make a new function drawAlien

also global vars I would put at the top

Greetings, Chrisir

If you need an answer, please send me a personal message since this forum doesn't notify.



float X=100, Y=100, r;
boolean t;


void setup() {
  size(200, 200);
  ellipseMode(CENTER);
  rectMode(CENTER);
}

void draw() {
  background(0);
  drawAlien();
}

void drawAlien() {
  translate(X, Y);
  rotate(r=(r+(t?.1:0))%TWO_PI);
  stroke(39, 242, 29);
  fill(255);
  triangle(0, 0, 30, 80, -30, 80);
  fill(39, 242, 29);
  ellipse(0, 5, 60, 60);
  stroke(127);
  line(10, 20, -10, 20);
  fill(mouseX, 0, mouseY);
  ellipse(-19, 0, 16, 25);
  ellipse(19, 0, 16, 25);
  stroke(255);
  line(-10, 80, -20, 100);
  line(-20, 100, -10, 60);
  line(10, 80, 20, 100);
  line(20, 100, 10, 50);
}

void keyPressed() {
  if (key==CODED)
  {
    if (keyCode==UP)Y--;
    if (keyCode==DOWN)Y++;
    if (keyCode==RIGHT)X++;
    if (keyCode==LEFT)X--;
  }
  if (key=='t') {
    t=!t;
  }
}
// end of sketch