How to use time picker

i want to add a time picker so the user can enter the entrance and exit time but when i try to change the exit time the time isn’t changing, how i can fix it ?

You have added the time picker2 blocks inside timepicker1, so it didn’t trigger. Pls drag timepicker2 and add the relevant blocks in Tp2 after time set

i want one time picker is showing so i decided to hide the time picker2 and when time picker1 is set then the time picker2 will run automatically

Automatically mean, once timepicker1 after set time I hope you designed it to open. It is ok, but you should move the blocks as said above.