Steps of making hibiscus into indicator
1)Cut approximately 10 mature hibiscus flowers.
2)Remove the stigma, and detach the leaves, so as to have only the red petals remaining.
3)Put them in a container, and pour approximately 6ml of ethanol or surgical spirit; the latter works best.
4)Crush the petals using an appropriate implement, such as a mortar and pestle. Crush until all of the liquid has been extracted from the petals.
5)Filter the solution, and you have the reddish indicator ready.
Acid--> towards highlighter red,
Base--> towards dark green (almost black).