Apply glue to a piece of slide 2 and affix to the 2 parts of slide 1, making sure that the cut line of slide 2 is perpendicular to the cut line of slide 1.
repeat the operation with the second part of slide 2
3
Step3: Glue the slide 3
Apply glue to a piece of slide 3 and affix to the 2 parts of slide 2, make sure that the cutting line of slide 3 is different than the cutting line of slide 1 and 2
repeat the operation with the second part of slide 2
4
Step4: Glue the slide 4
Apply glue to slide 4 and apply to the center of slide 2