Deciphered http://codepad.org/ngiITeZ4

Draw ASCII art

var offset = 0;

var decodeChar = function (char, on) {
    var code = char.charCodeAt() - 64;
    var out = '';
    while (code-- > 0) {
        out += offset++ % 80 === 0 ? '\n' : (on ? '!' : ' ');
    }
    return out;
};

var decode = function (chars) {
    chars = chars.split('');
    var out = '';
    for (var char = '', i = 0, on = false; char = chars.shift(); on = !on) {
        out += decodeChar(char, on);
    }
    return out;
};

decode('TFy!QJu ROo TNn(ROo)SLq SLq ULo+UHs UJq TNn*RPn/QPbEWS_JSWQAIJO^NBELPeHBFHT}TnALVlBLOFAkHFOuFETpHCStHAUFAgcEAelclcn^r^r\\tZvYxXyT|S~Pn SPm SOn TNn ULo0ULo#ULo-WHq!WFs XDt!');