the use of translate inside a for statement?

PlzHelp

inside the for statement I seem don't understand the mechanism of the 2nd translate( 0 ,8)

here is the orig code from the book : (see below)

what does this mean ?

for each "for" statements run an addition + 8 in the original translate(xpos, 0) is added and additional -0.12 for the angle :  since its 14 units meaning 14 lines

1st run: translate(xpos, 0); rotate 0      
2nd run: translate(xpos, 8); rotate -12
3rd run: translate(xpos, 16);  rotate - 24
4th run: translate(xpos, 32); rotate - 36
so on;...

hence "line" is really :

1st run line (20,0,20,0);rotate 0 
2nd run line (20,0,20,8);rotate -12
3rd run line (20,0,20,16); rotate - 24
4th run line (20,0,20,32); rotate - 36  

in the real coordinates of processing ?

PlzHelp

int x = 20; // X-coordinate
int u = 14; // Units
float a = -0.12; // Angle

void setup() {
  size(100, 100);
  stroke(0, 153);
  smooth();
  noLoop();
}

void draw() {
  background(204);
  tail(20, 14, 0.22);
}

void tail(int xpos, int units, float angle) {
  pushMatrix();
  translate(xpos, 0);
  for (int i = units; i > 0; i--) { // Count in reverse
    strokeWeight(i);
    line(0, 0, 0, 8);
    translate(0, 8);
    rotate(angle);
  }
  popMatrix();
}

TfGuy44

It helps to be able to see what you are drawing...

int x = 20; // X-coordinate
int u = 14; // Units
float a = -0.12; // Angle

void setup() {
  size(400, 400);
  smooth();
}

void origin_axies() {
  pushStyle();
  stroke(255, 0, 0);
  line(0, 0, 20, 0);
  fill(0);
  text("x", 20, 0);
  stroke(0, 255, 0);
  line(0, 0, 0, 20);  
  text("y", 0, 20);
  popStyle();
}

void draw() {
  background(255);
  translate(width/2, height/2);
  origin_axies();
  stroke(0, 153);
  tail(20, 14, 0.22);
  noLoop();
}

void tail(int xpos, int units, float angle) {
  pushMatrix();
  translate(xpos, 0);
  for (int i = units; i > 0; i--) { // Count in reverse
    strokeWeight(i);
    line(0, 0, 0, 8);
    translate(0, 8);
    rotate(angle);
  }
  popMatrix();
}

PlzHelp

but wat bout trans inside the for ? what number do it originate ? to the first line ? or to the last?