Hello!

This is my first EVER command, so enjoy!

Anyway, here's the juice. This is a sign that reads: Hello! Welcome to my world. Enjoy! It has multiple colours, and is just a simple thing.

For those who do not know how to use commands:

1. Get a command block. (/give [player name] minecraft:command_block)
2. Get a redstone block. DO NOT PLACE.
3. Paste the command in the command block.
4. Put a redstone block next to the command block.
5. Hey presto! You now have your output!