convert a biq query sql to a looker dashboard/panel/look

[anilp]

HI 

I am new to looker ,

I have a simple sql

select count(*) from `acxm-amex-sandbox1a8e.infobase_data.emp` where Department_ID=1 and Employee_ID=5

Want to convert into a Dashoard/Look and  at runtime i should be able to pass the value to  Employee_id  dimension using drop down menu. 

thanks