How can i make this 2x2x2 piston door

i want to make a 2x2x2 door that retracts the front layer first then the back , the same on the other side input ( but mirrrored to be equal to the other one).i tried delaying the signal but i keep messing up and cannot figure out a way to do this

sorry for my bad english , i am workin on my english skills, and sorry if i misspeled something , i on a bus right now