Store multiple results in firebase without deleting previous ones

I got to the point of entering data in firebase, but I overwritten the value that is, how can I store the data that is entered without deleting the previous ones?

You have to add a new tag each time if you wouldn’t wants to overwrite the value.
You can achieve this by adding tag with random value like this first time when value store firebase tag will be 58257 and next time Firebase tag will be 19638. In this way, value will not overwrite.

Thank you very much for your answer but the problem is that I don’t know how to create the random label, can you help me with that?

You can use random integer block from maths area to get random integer from given values.