Assailed

How would you build the idea blue yellow plants ?

blue yellow plants is mentioned 1 times in Dorothy and the Wizard in Oz . Here are some examples of Instructions, 3D Models and prior art. What sort of materials would you use to create this idea?

Instructions to Build
They first passed through many beautiful gardens of flowers, which grew nearest the city; but Dorothy could hardly tell what kind of flowers they were, because the colors were constantly changing under the shifting lights of the six suns. A flower would be pink one second, white the next, then blue or yellow; and it was the same way when they came to the plants, which had broad leaves and grew close to the ground.
Artist Work
3D Models
Quotes
They first passed through many beautiful gardens of flowers, which grew nearest the city; but Dorothy could hardly tell what kind of flowers they were, because the colors were constantly changing under the shifting lights of the six suns. A flower would be pink one second, white the next, then blue or yellow; and it was the same way when they came to the plants, which had broad leaves and grew close to the ground.