[Illusionist]

Hello, i am an illusionist, and i am interested in creating a clock reaction for my show.

What are 2 transparent liquids (transparent as water), that poured together, turns color into a red-wine color? (dark purple, not black)
The liquid must change color, automatically, after 60 seconds they are mixed.

What are those 2 transparent liquids that i should use?
The liquids should be carriable in normal plastic water bottles

Thanks a lot for who is competent enough to solve this question

[billnotgatez]

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