opencomputer mining

local robot = require 'robot'
local diameter, depth, x, z, y

function getNumberInput(message)
  local validInput = false
  local userInput
  while not validInput do
    io.write(message)
    io.flush()
    userInput = io.read()

    validInput = tonumber(userInput) ~= nil
    if not validInput then
      io.write("Please enter a numeric value")
      io.flush()
    end
  end
  return tonumber(userInput)
end

function digForward(blocksToDig)
  local cannotMove
  for i = 0, blocksToDig, 1 do
    cannotMove = robot.detect()
    if cannotMove then
      robot.swing()
    end
    robot.forward()
  end
end

diameter = getNumberInput("What size hole should I dig?")
depth = getNumberInput("How deep should I dig? (-1 means I'll go till bedrock WARNING DO NOT DO THIS IF THERE IS NO BEDROCK ONLY VOID!!!)")

print(diameter)
print(depth)