A very easy to learn whole tone pattern
Here is an easy whole tone lick I got from a saxophone player I used to work with back in Japan.
Here is a sound sample on trumpet:
How to memorize the lick in 12 keys:
Because it is a whole tone pattern based off using an augmented triad you’ll only need to memorize the pattern in 3 keys depending on what note you start on. This is your triad for the above example: C E G#. As you can see everything is a whole step apart going down the C augmented triad. So memorizing the lick with the augmented triad in mind makes it a whole lot easier to learn in 12 keys.