The challenge's like this. Suppose you have a beaker containing a liquid of transparent or any color. You add some drops of another liquid and the beaker turns into, say, red after some swishing. You add some amount of yet another liquid and the solution now turns into cyan. The process is repeated for at least 5 times, giving us a 'chameleon' beaker that eventually displays all the rainbow's colors.
Let's call that a pathway, for I don't know a better word. So... do pathways like that exist? Provided:
- You can do as many steps as needed. Having way more than 7 colors is even more fun!
- At each step, the added liquid, the beaker's solution and the result should not share the same color. For example, if we add some blue drops to a transparent solution and it turns blue, then the thing is not really impressive. Adding some purple drops and turning a whole beaker of orange into purple is somewhat OK.
- Precipitation is acceptable but not encouraged.
- Dramatic effects like smoke or sizzling are great! If they're not dangerous.
- The 'added thing' can be liquid or solid or really, any substance.