Image Line Glitch

PImage v;

​

void setup() {

  v = loadImage("PrayerFlags.jpg");

  size(720, 480); // flags

}

​

void draw() {

  image(v, 0, 0);

  for (int i = int(width*.2); i<height-int(width*.2); i++) {

    int sx = int(random(-75, 57)+width*.75);

    makeLine(sx, i);

  }

}

void makeLine(int _x, int _y) {

  color c = get(_x, _y);

  stroke(c);

  line(_x, _y, width, _y);

}

void makeVLine(int _x, int _y) {

  color c = get(_x, _y);

  stroke(c);

  line(_x, _y, _x, height);

}