Make sure that the camera is really secure on the tripod. Any movement at all will ruin the shot. Now frame the shot up and ensure everything on the tripod is locked down

Set the camera to manual focus and ensure the focus is set correctly.

Set your camera to manual and set the ISO and Aperture for the effect you’re hoping to achieve. Next, set the shutter speed so that the exposure is correct. The easiest way to do this is by using the internal light meter built into the camera. Roll the shutter speed wheel until the line on the light meter lines up with the middle, marked with a 0.

Connect your intervalometer to your camera. If you're using Triggertrap Mobile, connect your kit from your phone to your camera and open the Triggertrap Mobile app. Now open Timelapse mode. Set an interval of 10-15 seconds.