Because its always the same.
You ask what functions you have to use.
Someone posts them.
After that you ask for an example, whatever you mean by that.
But it feels like you never actually finish something, considering your skills don't seem to improve at all.
I would like to help you, but you always ask this weird questions.
You should at least have tried something on your own before you post here, so you can ask about some specific problem.