hide rows based on a critera

According to the sample file there are many values in a range.
I want to use 2 buttons one for HIDE specific rows from a range A1:G11 one for UNHIDE all rows in the sheets.
The HIDE function could be based on the content of the column B just in range A1:G11.
If cells in column B in the specified range have value 0 the rows have to be hide.