I'm fairly new to Geometry Nodes.  
I'm trying to create a certain amount of 90° arcs using Geometry Nodes, where each arc has a different radius but a common center point, such that the distance between each arc is constant.

[![enter image description here][1]][1]

I also want the arcs to only start after a certain threshold value (`t` in this example)

My current setup is as follows:

[![enter image description here][2]][2]

That yields the following result:

[![enter image description here][3]][3]

Currently the center of each arc moves along the initially generated line. Instead of that, I want to keep the center the same but change the radius instead. How can I achieve this?


  [1]: https://i.sstatic.net/KMUo6.png
  [2]: https://i.sstatic.net/onBQ1.png
  [3]: https://i.sstatic.net/dDwUD.png