Animate by List Item?

Hi everyone

Ive been trying to find a way to animate these hearts appearing along a spiral, so that it starts at the very middle of the spiral and appear on aftet the other in succession until the end of the spiral. This is how far we've gotten, with a lot of help from a fellow grasshopper member Riccardo. But I am still having trouble figuring out the best way to do this, in the file bellow you will see two approaches, one is a Kangaroo animation, where the heart travels along the spiral, but how do we get it to replicate instead of just one traveling the spiral?

One idea was plugging in series to the equation, but what ended up happening was it would slow down with the iterations.

Second is basically an array orienting the hearts based on planes defined by divisions on the curve, but how does this get animated to appear one after another? My guess was something to do with list item, since you can refer to each one of the hearts in the sequence. Any ideas?

ANY help would be much appreciated, 

Thank you