Ok, here we go with final version of first attempt of intro coding.
We have for now: rasters top/bottom, multicolor logo, 1st scroller with 1x1 and 2nd scroller with 2x2 three lines of text with sinus, some colourwash routine,music and second screen.
To add: better colourwash scheme for 2nd scroller, some effect to the three lines of text and logo.
To learn: using IRQ instead of rastertime with $d012.
Thank you all for your time.