Why won't my discord bot work?

Recently, I have been trying to make a discord bot. All has gone well, until I run the start.bat file. As soon as I run it, I get this:

    client.on('ready', () => {
                    ^
SyntaxError: Unexpected token )
    at exports.runInThisContext (vm.js:73:16)
    at Module._compile (module.js:443:25)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)
    at startup (node.js:129:16)
    at node.js:814:3

Any clue what this means and how I can fix it?

via CMWAidan x