Sure I (and very very likely the other quoted users) know of ways to the solution. Though my understanding of this forum is not for delivering ready to use code.
You have posted a pretty good description of the wanted functionality.
As in most applications you need to execute multiple tasks in "parallel"
This requires non-blocking timing.
And your application overall can be solved with a state-machine.
If you have any specific questions ask them here in the forum.
Read the linked tutorials and then ask specific questions.