Loads a sprite from a file

@param {String} args The arguments to the command
@constructor
function LoadspriteCommand(args) {
    var parsed = new statements.ArgumentStatement(args);

    if (parsed.args.length < 2) throw new SyntaxError('LOADSPRITE command requires 2 arguments');
    else if (parsed.args.length > 2 && parsed.args.length < 5) throw new SyntaxError('LOADSPRITE command requires 5 arguments');

    this.id = parsed.args[0];

    if (parsed.args.length > 2) {
        this.x1 = parsed.args[1];
        this.y1 = parsed.args[2];
        this.x2 = parsed.args[3];
        this.y2 = parsed.args[4];
    } else {
        this.fileName = parsed.args[1];
    }
}