Launch Ableton Live on your computer.
Open the instrument library and drag the "Drum Rack" onto a MIDI channel.
Click on the "Drum Rack" tab near the bottom of the screen.
Begin to load drum samples into your kit. It does not matter what key (C1, D1, E1, etc.) you assign sounds to because you won't be using a keyboard.
Engage "Draw Mode" by clicking the "Draw Mode Switch" (pencil icon) in the top menu.
Click on an empty grid in the "note editor" to draw a MIDI note (beat).
Continue adding notes to the empty grid boxes to create your drum beat.