Start mission button working

[Archiesachin]

PR Description 📜

Please include summary related to the issue you have fixed and describe your PR in brief over here by specifying the issue number on which you were working below Fixes #117

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Mark the task you have completed ✅

• [X] I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
• [X] I have performed a self-review of my own code or work.
• [X] I have commented my code, particularly in hard-to-understand areas.
• [X] My changes generates no new warnings.
• [X] I have followed proper naming convention showed in CONTRIBUTING GUIDELINE
• [X] I have added screenshot for review.

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