Output

Code

r$.settings().debug = true;
r$.settings().indent = true;
r$.settings().useMediaQuery = false;
r$.set('width','px').custom([200,100],[400,200],[900,450],[1200,600],[1800,900]).linear(5).applyTo('#box');
r$.set('width','px').as(function(w){ return Math.round(w/2); }).applyTo('#box2');
r$.start();