TestProgram.lua

function detectLeft()
    turtle.turnLeft()

    for i = 0, 20, 1 do
        turtle.select(Block)
        detected = turtle.compare()
        if detected == true then turtle.turnRight() return true end
    end
    turtle.turnRight()
    return false
end
function detectRight()
    turtle.turnRight()

    for i = 0, 20, 1 do
        turtle.select(Block)
        detected = turtle.compare()
        if detected == true then turtle.turnLeft() return true end
    end
    turtle.turnLeft()
    return false
end


for i = 0, 20, 1 do

    if turtle.getFuelLevel() < 200 then
        turtle.refuel(1)
        print("Refueling")
    end

    if detectLeft() == true then
        turtle.turnLeft()
        turtle.dig()
        turtle.turnRight()
    end
    if detectRight() == true then
        turtle.turnRight()
        turtle.dig()
        turtle.turnLeft()
    end


    turtle.forward()
end