Creation of a "POOL IS CLOSED" sign to go pool-side, attached to a fence, etc.
(1) Optional Header; e.g., NOTICE, ⚠WARNING, ⚠DANGER, ATTENTION or "Sorry..." ⚠ is optional.
(2) Mandatory Large text; "POOL CLOSED" is preferred or POOL CLOSED NO SWIMMING, THE POOL IS CLOSED, SWIMMING POOL CLOSED, POOL'S CLOSED, POOL AREA CLOSED FOR MAINTENANCE, POOL CLOSED CHEMICALS IN USE (Select one of these phrases or something similar).
(3) A friendly orca (killer whale), getting the viewers attention to the fact that the pool is closed. Orientation and size of whale is up to you. The orca MAY be conveying to the user that the pool is closed, even if he's just reading the text, has a flipper gesture, or whatever.
(4) Colors: three or four total colors throughout (including background color), your choice of colors
(5) small text (hard to see - barely visible, though there for necessity); © Gliesian, LLC. All Rights Reserved.
(6) 3:2 ratio e.g., 18" x 12"
(7) A border would be nice, even if it's a thin line.
(*) optionally consider doing a POOL OPEN sign
(*) optionally conside doing a POOL AREA with Kepp Gate Closed subtext.