How to do Bilikasana the Cat yoga warm up exercise

The bilikasana is the yoga cat exercise. Imagine you were a cat who arches and hollows its back. Move slowly and breath in and out deep.

# Kneel down and place your hands on the floor.
Thighs and arms vertical.
# Breath out and move up your lower back, until you can see your belly button.
Arch your back like a cat and hold this position while you breath in for appr. 2 seconds.
# Then breath in and let your lower back sink back down.
Move your head up and make a hollow back.
Look up and hold this position for appr. 2 seconds.
Then repeat the whole thing.
# 5 to 10 repetitions.