Don't Worry about this! It was Mojang's annual April Fools joke! They have a tendency to do this every year where they do something. Since they were working on new textures, they decided to do this this year. If you need proof, here is a video of a youtuber showing this joke off:








I hope this helps - Agentdid127

If it helps they just converted it back into the normal textures ;D

this is just an april fools prank from mojang. the textures should most likely go back to normal tomorrow, you can tell they're joking if you look at this