2D Parallax

What way do people know how to do parallax scrolling?

I myself am attempting to create parallax scrolling where if you take for example doodle jump, whenever you jump higher, the background will move, and when you fall the background will move again. SO the backgrounds movement is all dependent on the characters movement. I have tried using the transforms to change the positions and also rigidbodies, but niether are working correctly, each of them result in whenever i fall the backgrounds move faster than i need them too.