Mining

function turtle.forwards(numForw)
    for i = 1, numForw do
        turtle.forward()
    end
end

function turtle.upwards(numUpw)
    for i = 1, numUpw do
        turtle.up()
    end
end

function turtle.downwards(numDownw)
    for i = 1, numDownw do
        turtle.down()
    end
end

function turtle.turns180()
    for i = 1, 2 do
        turtle.turnRight()
    end
end

function scan()
    if turtle.detect() then
        turtle.dig()
    end
end
function scanUp()
    if turtle.detectUp() then
        turtle.digUp()
    end
end

function mining(distance)
    for i = 1, distance do
        scan();
        scanUp();
        turtle.forward()
        i = i + 1;
    end
        scanUp();
    for i = 1, distance do
        turtle.back()
        i = i - 1;
    end
end

print("input mining length")
local distance = tonumber(io.read())
while not distance do
    print("Invalid input. Please enter a number.")
    distance = tonumber(io.read())
end

mining(distance)
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
mining(distance)
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
mining(distance)
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
mining(distance)
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
mining(distance)
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
mining(distance)
turtle.turnLeft()
turtle.forwards(5)
turtle.turnRight()