How do you jump a bike jump?

there are 3 steps to jumping on a bmx bike:

1) compress- put your weight over the handlebars

2) quickly lean back over your seat

3) after doing this, your front wheel will lift off of the ground. to lift the back wheel up, scoop your opposite foot out and up in a "j" motion while your front wheel is in the air

once you are able to get both wheels in the air, continue practicing and eventually your bunny hops will become higher and higher