# Density type puzzle 6

Another puzzle in the spirit of this puzzle. No RGB tricks or distractions. Enjoy!

The border is:

A morse code, blues mean bars and yellows mean dots.
The message will be "ONE SQUARE OF 6X6 TWO VERTICAL LINES".

Based on it:

We need to tile the $$9$$ tetrominoes into squares with two vertical lines.
The configuration will be this.

Now:

If we treat black cells as 1's and white cells as 0's, we can read the message in binary.
The message is this.

Maybe there's a slight error here, but you can read the final answer as:

MORSING BINARZ[Y] TETROMINOES

• So fast! You are of course completely correct. And yes, I made a mistake with the "Y", rendering it as "Z". Sorry about that. Very well done!
– Jens
Nov 8 '19 at 4:23