I, personally, use the first layer calibration a lot, and I am guessing most of you do as well. However, I also wanted something that could calibrate the 2nd layer as well. So, I remixed Herbert's “bed level correction for Prusa mini”, so it could be printed at twice the hight. I also tweaked it a bit just to customize it a little bit more. 

Print settings:

Layer hight (all layers except for the first): 15mm

First layer: 2mm

Material: Any (I used PLA)

speed: 110%

Infill: doesn't matter