Javascript loop example

gistfile1.js

// Instead of something like this:

level0_obstacle1[100] = "obstacles10.png";
level0_obstacle1[3700] = "obstacles10.png";
level0_obstacle1_add4[3900] = "obstacles10.png";
level0_obstacle1[6600] = "obstacles10.png";
level0_obstacle1[10100] = "obstacles10.png";
level0_obstacle1_add4[10500] = "obstacles10.png";
level0_obstacle1[16000] = "obstacles10.png";
level0_obstacle1[16700] = "obstacles10.png";
level0_obstacle1[22400] = "obstacles10.png";
level0_obstacle1[25400] = "obstacles10.png";

// you can do this:
for (var i=550; i < 28000; i += 1100) {
  level0_obstacle1[i] = "obstacles10.png";
}

// the 550 is the starting number, the 1100 is the amount to increment each time