UAS regulatory sequences drive expression of a hairpin RNA which targets the mCherry fluorescent protein. The hairpin was made using the following oligos - forward:ctagcagtCGAGTTCATCTACAAGGTGAAtagttatattcaagcataTTCACCTTGTAGATGAACTCGgcg , reverse: aattcgcCGAGTTCATCTACAAGGTGAAtatgcttgaatataactaTTCACCTTGTAGATGAACTCGactg.