Source code in the plain programming language

To run:
Start up.
Split "Hello,How,Are,You,Today" into some string things given the comma byte.
Join the string things with the period byte giving a string.
Destroy the string things.
Write the string on the console.
Wait for the escape key.
Shut down.

To join some string things with a byte giving a string:
Get a string thing from the string things.
Loop.
If the string thing is nil, exit.
Append the string thing's string to the string.
If the string thing's next is not nil, append the byte to the string.
Put the string thing's next into the string thing.
Repeat.