Fixed

PLAYERS, LEFT_KEYS, RIGHT_KEYS = { }, { 68, 69  },  { 81, 37 }
function changeSpeedChanger()
    for key, value in pairs(tfm.get.room.playerList) do
        PLAYERS[#PLAYERS + 1] = key
    end
    SPEED_CHANGER = PLAYERS[math.random(1, table.getn(PLAYERS))]
    tfm.exec.setUIMapName("<N>Speed changer :<V> "..SPEED_CHANGER)
end
function eventChatCommand(playerName, command)
    local args = { }
    for split in string.gmatch(command, "[^%s]+") do
        table.insert(args, split)
    end
    if args[1] == "speed" and args[2] and args[3] then
        if playerName ~= SPEED_CHANGER and (tonumber(args[2]) <= 50 and tonumber(args[2]) >= -50) and (tonumber(args[3]) <= 50 and tonumber(args[3]) >= -50) then
            PLAYERS[playerName].LEFT_SPEED, PLAYERS[playerName].RIGHT_SPEED = args[2], args[3]
            print("Set"..name.." speed to "..args[3].." and "..args[4])
        else
            if tfm.get.room.playerList[args[2]] and playerName == SPEED_CHANGER and tonumber(args[3]) and tonumber(args[4]) then
                PLAYERS[args[2]].LEFT_SPEED, PLAYERS[playerName].RIGHT_SPEED = args[3], args[4]
                print("Set"..args[2].." speed to "..args[3].." and "..args[4])
            end
        end
    end
end
function eventKeyboard(playerName, keyId, down)
    if keyId == 68 or keyId == 69 and down then tfm.exec.movePlayer(playerName, 0, 0, true, PLAYERS[playerName].LEFT_SPEED, 0, true)
    elseif keyId == 81 or keyId == 37 and down then tfm.exec.movePlayer(playerName, 0, 0, true, PLAYERS[playerName].RIGHT_SPEED, 0, true)
    end
end
function eventNewPlayer(playerName)
    PLAYERS[playerName] = { LEFT_SPEED = 45, RIGHT_SPEED = -45 }
    for i = 1, 100 do tfm.exec.bindKeyboard(playerName, i, true, true) end
end
function eventNewGame() changeSpeedChanger() end
for key, value in pairs(tfm.get.room.playerList) do eventNewPlayer(key) end
changeSpeedChanger()