[CC] COS-CJE go program

local tArgs = {...}
local direction = tArgs[1]
local distance = tArgs[2]

if not direction then
    iox.colorPrint("No direction given: forward, back, up or down", colors.red)
    return
elseif direction ~= "forward" and direction ~= "back" and direction ~= "up" and
        direction ~= down then
    iox.colorPrint("Invalid direction: "..direction..
            ", use forward, back, up or down", colors.red)
    return
end
if not distance then
    distance = 1
end

if direction == "forward" then
    navigate.forward(distance)
elseif direction == "back" then
    navigate.back(distance)
elseif direction == "up" then
    navigate.up(distance)
elseif direction == "down" then
    navigate.down(distance)
end