CodyWalker

function countPieces() {
    it = b.pieces();
    var i = 0;
    while (it.current()){ i++; it.next() }
    return i;
}

function getRandPiece() {
    var it = b.pieces();
    var n = Math.floor(Math.random()*countPieces());

lg0

<!-- copy this to YOUR_THEME.tmTheme-->
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	    <key>name</key>
	    <string>diff: deleted</string>
	    <key>scope</key>
	    <string>markup.deleted</string>
	    <key>settings</key>
	    <dict>
	        <key>background</key>
	        <string>#EAE3CA</string>