Hello, there. You need to make an application in the form of a table. An example can be viewed by clicking on the link to have a concept of the representation: Tekst ukryty
So, you need the application the same as in the link above: so that the table can be edited, add new records, fields, columns, etc. Next, the selected cell should be given a color (red, green or yellow) of its choice. The design is not critical, as long as the application is working. Additional: Create an administrator who can create users to work with this table. Edit the table could only administrator and users appointed by the administrator.