Looping until empty

HI Experts,
I have a problem I need help with.
I have studied the "Match" and "Vlookup" in excel but they seem to just "get" the cell information, and I want to "put" the information based on match or lookup, probably looping, I'm not sure which.

The Workbook has two sheets, Sheet1, Sheet2.
Sheet1 has static data;
Column A week numbers, Column B dates, column C text;
Row 1 has code numbers from D1 through AX1

Sheet 2 has data pasted to it each week, always starting from A2 (row 1 has headings) and when the data has been dealt with it is then cleared.
Column A has code numbers
Cell B2 has the date
Column C are numbers
Cell D2 has a number

This is probably a big ask, but I would like to automate the process of dealing with the data in sheet 2.

Process;
1. Look at the date in Sheet2 B2, and find the matching date down column B of Sheet1. The row number of this matched cell is now the entry row for the remaining data.
2. Copy Sheet2 D2 value, to column C in the entry row of Sheet1.
3. Look along row 1 in sheet1 until a cell matches A2 in Sheet2, then copy Sheet2 C2 value to the entry row in this matched column in Sheet1.
4. Delete row 2 in Sheet2.

Repeat steps 3 and 4 until no data is in A2 Sheet2.


As always, your time is much appreciated.