Pulsating heart or how to make a valentine

Valentine 1
Valentine 2
Valentine 3
Valentine 4
Valentine 5
Valentine 6
Valentine 7
Valentine 8
Valentine 9
Valentine 10
Valentine 11
Valentine 12
Valentine 13
Valentine 14
Valentine 15
Valentine 16
Valentine 17
Valentine 18
Valentine 19
Valentine 20
Valentine 21
Valentine 22
Valentine 23
Valentine 24

TCH, Created with GeoGebra