Determine the overall project status based on the start and end dates of the different tasks

[Alish Maity]

I am using JIRA cloud. I need to show the status of my overall project based on the start date and end date of the different tasks. The logic is as follows - 

1. If there is no difference between target end date and projected end date of tasks, the overall project status would be Green

2. If there is difference between target end date and projected end date of tasks, but it does not affect the overall timeline of the project, then the overall project status would be Orange.

3. If there is difference between target end date and projected end date of tasks and it does affects the overall timeline of the project, then the overall project status would be Red.

Please suggest , how best I can implement this requirement.