Select Extrude 2 from Model Tree, right click and select the pattern feature.

Select Pattern type as Axis.

Select the DATUM AXIS as shown.

This will create 4 extrudes as shown in the figure.

Select Pattern of Extrude 2 from Model Tree,

then right-click and select the pattern feature.

Select Pattern Type as Direction.

Select the edge as the reference of direction as shown in the below image.

Now the Pattern of Pattern has been created.

Note:

After creating Pattern of Pattern, you cannot create a pattern for the same feature. You can only create one pattern of a pattern.

Select Pattern 2 of Pattern 1 from Model Tree,

then right-click and select Delete.

This will delete everything

i.e. 2 patterns along with pattern leader.

Select Pattern 2 of Pattern 1 from Model Tree,

then right-click and select Delete Pattern.

Now the pattern of the pattern is deleted.

Now check if the name is displayed as Pattern 1 of Extrude 2.

Now, Select Pattern 1 of Extrude 2 from Model Tree,

then right-click and select Delete Pattern.

Now only Extrude 2 will remain and Pattern 1 will be deleted.