How to do a for loop

Firsly, you need wash your hands. Go to the bathroom and take the soap.

Now we going to write a for loop:

for (statement 1; statement 2; statement 3) {
  hackNASA()
}

A explanation:

• statement 1 is executed (one time) before the execution of the code block.
• statement 2 defines the condition for executing the code block.
• statement 3 is executed (every time) after the code block has been executed.
• hackNASA() to get a alien wallpaper.

Real life case of use:

for (let step = 0; step < 5; step++) {
  hackNASA(step)
}

With this snippet you can get five alien wallpapers from the NASA database.