ComputerCraft Mining Turtle Strip Mine

-- get lengths
print ("Amount of aisles:")
local aisles = tonumber(read())
print ("")
print ("Length of aisles (to the sides):")
local aislelength = tonumber(read())
print ("")

-- loop
for a=1,aisles do
    -- mine straigh aisle
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.dig()
    turtle.forward()
    turtle.digUp()

    -- left aisle
    turtle.turnLeft()