hopperFeeder.lua

chest = peripheral.wrap("diamond_4")
hopper = peripheral.wrap("hopper_0")
direction = "EAST"

stackID = 1

chestMax = chest.getInventorySize()

stack = chest.getStackInSlot(1)
while stack == nil do
    stack = chest.getStackInSlot(1)
    sleep(0.1)
end

while true do
    stack = chest.getStackInSlot(stackID)
    hopperStack = hopper.getStackInSlot(1)
    if stack ~= nil and hopperStack == nil then
        stackTable = chest.getStackInSlot(stackID)
        chest.pushItemIntoSlot(direction, stackID, stackTable[qty])
        stackID = stackID + 1
        if stackID > chestMax then
            stackID = 1
        end
    elseif stack == nil and hopperStack == nil then
        stackID = 1
    end
    sleep(0.1)
end