stairdig.lua

function digRow(a)
for x=1,a,1 do
turtle.dig()
turtle.forward()
end
end

print("Enter length")
l=io.read()

print("Enter width")
w=io.read()

turtle.digDown()
turtle.down()

for y=1,w,1 do
for x=1,l,1 do
digRow(1)
end

if (y % 2 == 1) then
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.turnRight()
else
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.turnLeft()
end
end