A utility-function for adding squences in velocity.js, was the base of the sequences-functionality that is now present in velocity.js

add_sequence.js

/*
 animations is declared like this:
 - simple (one or more rules, in one duration):
 'name':{style:value,style2:value}
 - complex (one or more rules, split duration):
 'name':[
 [{style:value,style2:value},'unitless percentage of duration'||{options}],
 [{style:value,style2:value},'unitless percentage of duration'||{options}]
 ]
 */
 jQuery.velocity.add_sequence = function(name,calls){
     if(!Array.isArray(calls)){
         calls = [[calls,100]];
     }
    jQuery.velocity.Sequences[name] = function(el, options){
        var options = options || {},
            duration = options.duration || 1000,
            parts_count = calls.length;

            calls.forEach(function(call,i){
                var opts = (/(\d)$/i.test(call[1])) ? {duration:call[1]} : call[1]; // nice with shorthand duration
                if(i+1===parts_count) opts.complete = options.complete;
                opts.duration = (duration/100)*opts.duration;

                jQuery.velocity.animate(el,call[0],opts);
            });
    };
};