This is pretty easy. In fact, you can find the answer if you look at the photos you've taken so far or look around the environments you've been in. But if you are still confused, the answer is also very easy.
You can change your Instagram theme periodically at the beginning. For example, you can share photos like this at a time when there are plenty of oranges and leaves are surrounded, along with the theme of Halloween at fall time. You can share winter photos right after Christmas and New Year arrives. This time, your color scheme may shift from oranges and browns to reds, greens and whites.
Sharing on different topics and topics that people are excited about during the holidays will not only be more pleasing to the eye but also attract people to your page's content.