Haven for an Olive Tree and Doves

In an unknown place, there grows an olive tree, many doves are attracted here.
Water to grow the tree, feed doves.
Doves will fly out with olive leaves, and fortunately come back with colorful flags!

This is an idle game playing with a few clicks.
Click to water the tree and feed doves.
Without clicks, it would also be raining and tree be watered by rainwater, and doves could fly out for food.
It's unnecessary to always stay online, keep online for a few minutes some days and the game is also possible to be completed.

This game is text-only with no graphics or music. It's also completely free.