Create a new pattern.
You may choose from these options:
Single Cell Origin (default setting)
Color >
redaquabluebrowngreen
orangeblackpinkpurpleyellow
Random Cell Origin Blue and White >
       
 Random Cell Origin Color Blocks Black BG >
       
Setting the Rule

Step 1.
Option A. Set the "rule" manually by clicking on the bottom row squares to change them from blue to white. You may change all or none.
A
A
A
A
A
A
A
A

start over
OROption B. enter a number between 0 and 255, and click "enter" or make a selection here

Determine the size and shape
Step 2. Select the number of columns here >
select desired shape
squarehorizontal Rectanglevertical Rectangle
Step 3. click to make image