Creating compound microscope

I have to create sort of a prototype i guess u wud say of the compound microscope on a metre stick. This will be done by holding lenses on top of the ruler, and magnifying the object atleast 3 times. I was planning on doing a sort of a compund microscope wid 2 lenses, each lens magnifying the object 2 times.. The one closest to the object being 200mm focal length and the one after 100mm focal length (converging lenses). I need to use the thin lens eqn (1/f = 1/di + 1/do) and the magnification eqn (M = -di/do = hi/ho) to set the object apart from the lens so in the end there wd b an image formed that wd b atleast 3X magnification of object. I need to make a scale diagram of this, but imnot sure how to find the distances for the object from the first lens centre, the distance of the image (which bcumz the object for second mirror) from the second lens centre and how i wd find the final image's distance. And same goes for height of object and both images. ANy help wd b much appreciated as i have hit a brick wall. Or any suggestions in changes wid magnification or lenses wud b appreciated as well.

Thanks in advance