Just A Cool.
Minecraft Startup Loading Screen.
This Resource pack requires optifine to run.

All Worked versions.
1.8 - 1.13

Where is the loading screen file?
1 - first, extract the folder
2 - then open it and go to
3 - assets < mc < textures < gui < title < Mojang

How to change themes?
Rename the theme you want, to mojang.png
and name the already exiting mojang.png file
to something else like apple

Credits:
Edited on: Pixlr Editor 
Text Font: By Raftron gaming download