The prompt "Engineering for giving Arathi by copper thali to god in temple" appears to describe a ritual involving offering Arathi (a Hindu religious ritual of worship involving light) to a deity in a temple using a copper plate or thali. This ritual typically involves lighting a camphor or oil lamp and circling it in front of the deity as a form of prayer and reverence. However, it's important to note that engineering typically refers to the application of scientific and mathematical principles to design, build, and maintain structures, machines, systems, and processes. The act of performing Arathi with a copper thali is a religious or cultural practice rather than an engineering activity. If you have a specific engineering-related question or need related to temple architecture, lighting systems, or any other engineering aspect associated with temples, please provide more details or clarify your request, and I'll be happy to assist you accordingly.