Hello, i want to do a loadingscreen that´s the player changes the dimension to nether or the end and then teleport back to the overworld, i tryed with this code but doesn't works, i don't know why.. I test the command '/test ne' to teleport to the nether and then to make the transfer of worlds to the load of the screen, however when I use the command to go to nether it simply seems that it goes but I do not see any block there in nether, I simply get on the nether void with everything red and then I try to run the '/test ov' command and it looks like it returns to the normal world but I remain in the void and everything goes red anyway.. Should i generate the nether first? what i am doing wrong?