function digUp(roomZ)
 local var1, var2
 local i = 0
 for i, roomZ, 1 do
  os.sleep(0.5)
  var1, var2 = robot.detect()
  if var1 == true and var2 ~= "liquid" then
   repeat
    robot.swing()
    os.sleep(0.5)
    var1, var2 = robot.detect()
   until var2 == "liquid" or var1 == false
  end
  robot.up()
 end
 while i ~= 0 do
  robot.down()
  i = i - 1
 end
end