Swipe your screen to the left to see if any of the app icons start appearing.
If no joy,
Then, try a hard reset of your iPad by holding down both the Home and sleep/wake buttons simultaneously until your iPad goes to black and restarts with Apple logo, then release the buttons.
If still no joy,
Go into Settings App, General, Reset and try the Reset Home Screen Setting option.
If that fails to work,
If you have a computer running the latest iTunes, you may have to do a complete backup and restore of your iPad.
https://support.apple.com/en-us/HT203977#itunes
https://support.apple.com/en-us/HT201252
Good Luck to You!