Red flower bunches with red stems, whorled leaves, green -> yellow -> red -> black berries
Thats right, it is the showy scarlet bush or fire bush, the second of the 'hedging material' i was introduced to recently.
I learned that it is of the same family as the coffee (rubiaceae). Now i wonder what the flowers of the coffee plant are like? I must remember to observe when i visit the nearby coffee plantations in coorg and chikmaglur.