move on click

        var yodaGroup = new Kinetic.Group({
          x: 250,
          y: 30,
          draggable: true
        });

I want to adjust or add to the x and y cordinates for the yodaGroup above
using a button click that triggers this function below

// need to figure out this funnction
function left() {
yodaGroup.x += 5; // move image by 5px
}