Just like others explained, there is many ways to achieve what you want to achieve wit Scaler but, having said that, here comes barebone guide. Easy 19 steps
Open Scaler, click on SCALES (1) then click on a scale/key of your choice (2) and then select mode (3).
I have chosen F#min. As you got your chords from deCoda, it probably also detected the key (check it).
Next, click on the scale/key on the list (4) and look at chords to that belong to the scale (5).
Click on the blinky light (6) - this will allow you to explore the chords with your midi controller using the white keys (7). This is optional - you can just click on chords. Next we’ll be filling the pattern section (8) with progression.
Drag and drop chords you like (or you got from deCoda ) (9). Then press play (10). In my case it sounds like cr…distasteful as time measures are not fixed so I click edit (11).
Click on PLAYBACK TIMINGS (12) and adjust what is needed (13) in my case it was just making 3rd chord x2 longer.
Click on PERFORM (14). Then click on PERFORMANCES (15) just to see what’s there but leave it unchanged for now - you WILL explore later ;). Then click on ACCENTO (16) - again just to see. Then click on VOICE GROUPINGS (17) so that everything is more coherent.
Make it loop (18) and, taaadam!, click play (19). Enjoy!
Forgot to put numbers on MIDI CAPTURE (right bottom corner) – this is where you can record/save midi