So you have some plastic plugs embedded in the wall and you can't get them out. Here is a really simple way to remove them with ease.
Step 1: Tools and Things
Not many really:
A screw that fits in the plug
A pair of pliers
A wedge or block ( im using Swedish granite, as my garden is full of the stuff )
Step 2: Insert Screw Into Plug
Step 3: Grab Screw With Pliers and Place Wedge Underneath Pliers
Step 4: Hold Securely
Step 5: Tap the End of the Pliers
Step 6: Your Done!
Arduino Contest 2019