For my pictures I put the ISO on 100, the F5.6 and the shutter speed on bulb. For bulb, the shutter stays open for as long has you depress the button. The importance of having the shutter open so long for this is so the camera can trace the light and pick up the drawing. For the most part it was easy to draw with the flashlights. One of the harder things that didn’t work was that sometimes we couldn’t hold the light toward the camera lens. One of my frustrations was that I had a flashlight that was to bright and completely blew out the whole photo. To take this to the next level would be to go outside at night and trace objects in the real world.
See all of my photos here: https://photos.app.goo.gl/GM5Cxr8yG2Viu3B63