Flag of Guixers, in Lleida province, Spain.
Green flag with six white triangles, all isosceles with a horizontal symmetry axis, as high and long as 1/3 of the flag's height and length, placed three with their bases on the hoist, two in the middle toughing the first three and a further one on the fly touching the second two. Ratio 2:3. (Source: http://flagspot.net/flags/es-l-gxr.html)
Own work
Nethunter