Turtle Mining Script for my server

local side = "right" -- right for everything except wheat/carrot
function str1()
    for i=0,11 do
        turtle.place()
        turtle.forward()
    end
end
function str2()
    for i=0,11 do
        turtle.dig()
        turtle.forward()
    end
end
while true do
    if (side == "right") then
        sleep(5) -- allows for easy debugging
        turtle.forward()
        turtle.turnRight()
        turtle.forward()
        turtle.digDown()
        turtle.turnLeft()
        str2()
        turtle.turnRight()
        turtle.forward()
        turtle.digDown()
        turtle.turnRight()
        str2()
        turtle.turnLeft()
        turtle.forward()
        turtle.digDown()
        turtle.turnLeft()
        str2()
        turtle.turnLeft()
        for i=0,2 do
            turtle.forward()
        end
        turtle.turnLeft()
        for i=0,11 do
            turtle.forward()
        end
        turtle.turnLeft()
        turtle.turnLeft()
        sleep(5)
        print("Preparing Materials..")
        turtle.select(1)
        turtle.forward()
        turtle.turnRight()
        turtle.forward()
        turtle.placeDown()
        turtle.turnLeft()
        str1()
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
        str1()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
        str1()
        turtle.turnLeft()
        for i=0,2 do
            turtle.forward()
        end
        turtle.turnLeft()
        for i=0,11 do
            turtle.forward()
        end
        sleep(1200)
    elseif (side == "left") then
        sleep(5) -- allows for easy debugging
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.digDown()
        turtle.turnRight()
        str2()
        turtle.turnLeft()
        turtle.forward()
        turtle.digDown()
        turtle.turnLeft()
        str2()
        turtle.turnRight()
        turtle.forward()
        turtle.digDown()
        turtle.turnRight()
        str2()
        turtle.turnRight()
        for i=0,2 do
            turtle.forward()
        end
        turtle.turnRight()
        for i=0,11 do
            turtle.forward()
        end
        turtle.turnRight()
        turtle.turnRight()
        sleep(5)
        print("Preparing Materials..")
        turtle.select(1)
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.placeDown()
        turtle.turnRight()
        str1()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
        str1()
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
        str1()
        turtle.turnRight()
        for i=0,2 do
            turtle.forward()
        end
        turtle.turnLeft()
        for i=0,11 do
            turtle.forward()
        end
        sleep(1200)
    else
        print("Invalid side")
        return
    end
end