I wanted to make my own 1.14.4 Minecraft Pack, but I don't know where I can get the deafult from. Resourcepack24 has only for 1.8-9.
.minecraft - versions - 1.14.4 open the folder and then right click on the .jar file and open it with Winrar.
Then you drag the assets folder pack.png into a folder and then add an .mcmeta file from another texture pack and you're done.