how to write a message in a greetings:-a greeting is on grand parent

plz give me soon as possible

Messages in greetings are usually short and personal. We would request you to frame the message according to the given occasion. For example, a birthday message to a grandfather would be like this:  "You have been an inspiration to me. You have taught me the importance of love and kindness. Only warm wishes on your special day! Happy birthday to the greatest grandfather!". 

Hope this helps!