How to write the dragon character in China during the Han Dynasty?

The development of calligraphy in the Han Dynasty went through several periods. At first, the Han Dynasty inherited the Qin system and used seal script at first. Later, seal script showed a declining trend, and official script developed vigorously, and entered its heyday in the Eastern Han Dynasty. The cursive script (Zhangcao) developed into a relatively mature font in the Han Dynasty

so it depends on the period

If it is seal script in the early Han Dynasty, it is like this

If it is official script, it is like this

If it is cursive script, it is like this.