Autofill cells with condition

Question

I'm stuck with a code. I admit I´m not an expert programmer, but despite already having spent a good bit of time searching in the internet, I am not able to build the code. The situation is this.

I've got in SheetB 2 columns (A and C). In column A I have a bunch of ID numbers and there are always more rows with the same number (ex: ID 12345 is in Row 6 to 15). To each ID number there is a corresponding date in column C.

In SheetA, in Cell C4 I select the ID number and I want to create code that automatically fills the column F (sheetA) starting from row 12 with all the available dates matching the ID in SheetB.

Can someone help me please? Thanks!