I am pretty new to after effects, knowing only the bear minimum. What I am trying to accomplish is a multi colored progress bar of sorts.
For example I have 2 different colored solids and what I am trying to do is link or connect them to the ends of each other so that when I scale one up only horizontally with the anchor point at 0 , 50 the other layer will follow the now moving edge of the first layer. I know this can be accomplished with tedious keyframes but I was wonder if there was an easier way to accomplish this task.
The easiest way to do this is to draw out your bar with shape layers how you want it to be, then pre comp it them. Once pre comped, turn on continuous rasterization on the pre comp layer in the timeline. Move your anchor point with the 'y' key to where you want to scale from and unlink constrain proportions next to scale. Then just scale on x to your desired width (or indeed y).
Also, you could just do it all on one shape layer. Again, moving the layer anchor point to where you want to scale from.