Illustrator Pattern: Plaid Patterns
1- make a (1 cm) rectangle.
2- Through smart guides set construction to 45-degree angle.
3-Set stroke and fill to “non.”
5- With the pen tool drag a line across the square until it hits the 45-degree, give the line 3 pt black stroke.
6- with the selection tool grab the diagonal line to the right corner and anther one to the left, then select all three lines to change the color.
7- select the square and cope it then paste in back, set stroke and fill to “non”
8- select all and define the pattern.
9- draw a rectangle and fill it with the pattern.