divide timeline graph into 4 line time wise

I'm using google timeline graph to make a timeline graph for display one-day full activity. but when I render the graph it is too congested. so I have to try to divide the graph into 4 sets,

1. displays 00-00-00 time to 05-59-59
2. displays 06-00-00 time to 11-59-59
3. displays 12-00-00 time to 17-59-59
4. displays 18-00-00 time to 23-59-59 this is one timeline graph with one label(date) has 4 rows as I mentioned above Does anyone can help me with this. thank you