The URLs for all gifs on this page beging with https://members.tripod.com/~Zoots_GIFs_4_U/images/flags/ followed by the two letter post office abbreviation for that state.

AK (Alaska)
AL (Alabama)
AR (Arkansas)
AZ (Arizona)
CA (California)
CO (Colorado)
CT (Connecticut)
DC (District of Columbia)
DE (Delaware)
FL (Florida)
GA (Georgia)
HI (Hawaii)
ID (Idaho)
IN (Indiana)
IA (Iowa)
KS (Kansas)
KY (Kentucky)
LA (Louisiana)
MA (Massachusetts)
MD (Maryland)
ME (Maine)
MI (Michigan)
MN (Minnesota)
MO (Missouri)
MT (Montana)
NE (Nebraska)
NC (North Carolina)
ND (North Dakota)
NH (New Hampshire)
NJ (New Jersey)
NM (New Mexico)
NV (Nevada)
NY (New York)
OH (Ohio)
OK (Oklahoma)
OR (Oregon)
PA (Pennsylvania)
PR (Puerto Rico)
RI (Rhode Island)
SC (South Carolina)
SD (South Dakota)
TN (Tennessee)
TX (Texas)
UT (Utah)
VT (Vermont)
VA (Virginia)
WA (Washington)
WI (Wisconsin)
WV (West Virginia)
WY (Wyoming)