In a very large bowl, stir together pretzels and cereals.
Add candy and marshmallows then stir together.
Spread evenly onto a large baking sheet.
Cut Twizzlers into small pieces and add on top.
Add the M&Ms or Chocolate Candy on top.
In 3 separate microwave-safe bowls, melt the chocolate for 30 seconds, stir and continue heating for 10-20 seconds at a time, stirring after each heating until the chocolate is melted. Continue stirring until smooth. Do this with the white chocolate and candy melts.
Transfer into plastic squeeze bottles. (Optional - but easier to drizzle when using bottles.)
Drizzle with white chocolate, then red and blue melted chocolate.
Immediately add the sprinkles.
Let sit for 10-15 minutes to harden.
Break into pieces.
Store in an airtight container until ready to serve.