Time to give that ass a bit of attention.
Make sure you're untied and get down on all fours, (with the laptop in front of you) on the platform (floor or bed, up to you).
Let's get you warmed up first. Pick an implement again, you can use your hand if you have to. 20 nice, hard, smacks on each cheek should be enough.
Your ass should be getting nice and pink? No? 20 more then.