move.lua

local keymap = {
    [340] = "up",
    [341] = "down",
    [87]  = "forward",
    [265] = "forward",
    [65]  = "turnLeft",
    [263] = "turnLeft",
    [83]  = "back",
    [264] = "back",
    [68]  = "turnRight",
    [262] = "turnRight",
    [32]  = "exit"
}

while true do
    local e, key, held = os.pullEvent("key")
    local inst
    for k, v in pairs(keymap) do
        if k == key then
            inst = v
            break
        end
    end
    if inst ~= nil then
        if inst == "exit" then
            return
        end
        term.write(inst)
        if (turtle[inst])() then
           print()
       else
           term.clearLine()
           term.setCursorPos(1, select(2, term.getCursorPos()))
       end
    end
end