How can I do this while maintaining the same size of the scale?, thank you!!

[robortbus]

I don't understand how to do this, the more each line goes up there are fewer scales, so how do I make each floor lower the amount and so that they assemble well?

[Dragan]

https://www.itoosoft.com/tutorials/creating-a-christmas-tree-with-railclone-iii?back=page%3D7%26tag%3Drailclone