Taking item from chest in for loop

Hello all, i've got a problem in one of my function. I'm trying to take item from a chest to the turtle.
For that, i've made a for loop that will inspect the 16 inventory slot and suck() item from the chest if needed.

Here is my code

function checkInventory()
for i=1,16,1 do
  turtle.select(i)
  if facing == NORTH and i < 4 then
   turtle.turnLeft()
   facing = facing + 3
  else if facing == WEST and i > 3 then
   turtle.turnRight()
   facing = facing - 3
  end
  if turtle.getItemCount() > 0 then
   inSlot = turtle.getItemDetail(i)
   print(inSlot.count)
   print(inSlot.name)
   if inSlot.name == "minecraft:wheat_seeds" and inSlot.count < 2 then
	print("sake a coke")
	turtle.suck()
   elseif inSlot.name == "minecraft:wheat" then
	local count = turtle.getItemCount()
	turtle.drop(count)
   elseif inSlot.name == "minecraft:wheat_seeds" and i > 3 then
	turtle.drop()
   end
  end  
end
end
end

The thing that i don't understand is that the turtle print my "sake a coke" but doesnt seem to pick items. Is the for loop executing too fast for the suck to be effective ?

Thank you in advance.

Problem solved, i was having 2 error, one of my elseif was written "else if" and my facing was wrong.

Is the turtle's face towards the chest? turtle.suck yields within itself, so it's impossible to execute too fast without the use of coroutines (parallel uses coroutines). I don't see any of that here, so it can't be that.

It's almost certain turtle.suck() is being executed, but is it being executed in the correct direction?

line 7, you have a space in your else if