More about sequence
control number of objects resulting from sequence
In this example, the slider n control the total number of images created from the sequence command: Sequence[Dilate[[Rotate[poly1, k*t, A], r^k, A], k, 1, n] Change the value of n through the slider.
If you examine the object property, you will see an item called 'list1', which is the result of this sequence command. All the triangle images generated are grouped together as a list and cannot be edited individually. Instead, they can only be edited as a single object.