How do I use function and repeat action??

Hello i have working drag and drop inventory system.

Now i need to make drag and drop (to empty slot) automatically

i try figure out how set logic of events.

now here this looks like this:

i need receive:

1 When i Touch LOOT BOARD, all 'LootSlot' should spawn own new sprite 'DragEqitem'

2 this 'DragEqitem' should find empty slot and set his position to empty slot.

3 When find empty slot- simulate DROP