To design a web application for event registration.
use one of the UX application for designing purpose in my case I use figma application which is easy to use
First creat project file then go inside it and create pages
In that page create requried number of frames
After creating frames then go to design part which is on right side of the screen and select colors and different styles
Then assign each frame to your teammates and ask them to design frame as they wanted to do.
And if something has to add or delete in frame discuss with teammates and then decide.
After completion of designing go to prototype section and connect frame with other frame in respective order.
Thus the web application for event registration is successfully designed.