2. It places one or two drops of colouring of food in the water.
3. It leaves the white flowers all night and you will see how the petals change of color. The more the flowers in dyestuff, the more color are left take these.
THAT IT IS WHAT IT HAPPENS
Dyestuff travels through the capillaries of the plant and arrive at the petals. If you observe with care you will notice by where dyestuff in the petals entered.