This week’s cipher is a Rail Fence Cipher. It was used during the Civil War and is based on zigzag of a rail fence. You write this cipher in zigzag pattern.
Draw a zig zag:
Then write your message (bloom) from peak to dip: B O M
L O
To decode: Write the first letter on the top row, then the first letter on the bottom row, second letter on top row, second letter on bottom row, etc. The result is B L O O M.