Draconic Crafting Thing Simple pull and start (opencomputers mod)

local robot = turtle

local function pulse()
    redstone.setOutput("front", true)
    sleep(0.1)
    redstone.setOutput("front", false)
end

local function waitForCraft()
    while not robot.suck() do
        sleep(0.5)
        pulse()
    end
end

while true do
    waitForCraft()
end