Gather spackle or joint compound
Gather a putty knife
Gather sandpaper
Gather a drywall patch or mesh tape
Gather primer and paint
Clean the hole edges
Sand around the hole
Apply mesh tape or a drywall patch
Spread joint compound over the patch
Smooth the compound with a putty knife
Let the compound dry
Sand the area smooth
Apply a second coat if needed
Let it dry
Sand again
Apply primer
Paint to match the wall