Dig in pyramid pattern

term.clear()
term.setCursorPos(1,1)
print("Place chests in slot 1.")
print("Place light sources in slot 2.")
print("")
print("How big would you like the pyramid to be?")
write("-> ")
count=tonumber(read())
count=count-1
term.clear()
term.setCursorPos(1,1)
print("Now running. Make sure to keep chests in slot 1 and light sources in slot 2!")

if turtle.getItemCount(2)==0 then
    placeTorches=false
else
    placeTorches=true
    hasTorches=true
end

left=0
right=1
turn=right
turtle.select(2)
while count > 0 do
    countHold=count+1
    moves=count+1
    while countHold > 0 do
        countHold=countHold-1
        countAmount=count
        if moves > 0 then
            moves=moves-1
            while countAmount > 0 do
                turtle.dig()
                while turtle.detect()==true do
                    turtle.dig()
                end
                turtle.forward()
                countAmount=countAmount-1
            end
        end

        if moves > 0 then
            if turn==right then
                turtle.turnRight()
                turtle.dig()
                while turtle.detect()==true do
                    turtle.dig()
                end
                turtle.forward()
                turtle.turnRight()
                turn=left
            else
                turtle.turnLeft()
                turtle.dig()
                while turtle.detect()==true do
                    turtle.dig()
                end
                turtle.forward()
                turtle.turnLeft()
                turn=right
            end
        end

        if turtle.getItemCount(16) > 0 then
            turtle.select(1)
            turtle.digDown()
            turtle.turnLeft()
            turtle.turnLeft()
            turtle.placeDown()
            times=3
            while times <= 16 do
                turtle.select(times)
                turtle.dropDown()
                times=times+1
            end
            turtle.turnRight()
            turtle.turnRight()
            turtle.select(2)
        end
    end

    if turn==left then
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        if placeTorches==true then
            if hasTorches==true then
                if turtle.getItemCount(2)==1 then
                    hasTorches=false
                end
                turtle.turnLeft()
                turtle.turnLeft()
                turtle.dig()
                turtle.place()
                turtle.turnRight()
                turtle.turnRight()
            end
        end
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        turtle.turnLeft()
        turtle.digDown()
        turtle.down()
        turn=right
    else
        turtle.turnLeft()
        turtle.dig()
        turtle.forward()
        if placeTorches==true then
            if hasTorches==true then
                if turtle.getItemCount(2)==1 then
                    hasTorches=false
                end
                turtle.turnLeft()
                turtle.turnLeft()
                turtle.dig()
                turtle.place()
                turtle.turnRight()
                turtle.turnRight()
            end
        end
        turtle.turnLeft()
        turtle.dig()
        while turtle.detect()==true do
            turtle.dig()
        end
        turtle.forward()
        turtle.turnRight()
        turtle.digDown()
        turtle.down()
        turn=left
    end

    count=count-2
end