Strip v2.1

--[[
Version 2.1
Written by: Tom Nordloh (Notze)

This script will do the Stripmining
for you. Amount and length of the
branches are adjustable just as the
spacing between them also is.
Place the following things into the
Turtles inventory:
Slot 1: cole
Slot 2: torch
Slot 3: filling material
]]

-- make your adjustments here
local int branches = 5          -- the amount of "branch-pairs"
local int branchLength = 32     -- the length of each branch
local int branchSpace = 5       -- the space between each branch-pair
 -- end of adjustments

 function main()
     for i=1, branches, 1 do
            refuel(1+(branchSpace+branchLength*4)/96)
            forward(branchSpace+1)
            turnLeft()
            forward(branchLength)
            back(branchLength)
            torch()
            turnAround()
            forward(branchLength)
            back(branchLength)
            torch()
            turnLeft()
    end
 end

function refuel(amount)
        if turtle.getFuelLevel() < 96*amount then
                turtle.select(1)
                turtle.refuel(amount)
        end
end

function forward(length)
        for i=1, length, 1 do
                while turtle.detect() or turtle.detectUp() do
                        turtle.dig()
                        turtle.digUp()
                        sleep(0.5)
                end
                if turtle.detectDown() == false then
                        turtle.select(3)
                        turtle.placeDown()
                end
                turtle.forward()
        end
end

function back(length)
        for i=1, length, 1 do
                if i==9 then torch() end
                if (i-8)%16==0 and i>9 then torch() end
                turtle.back()
        end
end

function turnLeft()
        turtle.turnLeft()
end

function turnRight()
        turtle.turnRight()
end

function turnAround()
        turtle.turnRight()
        turtle.turnRight()
end

function torch()
        turtle.select(2)
        turtle.place()
end

main()