WYTWSZR3D6HIXT43YUIOFYSYWE66XOKYG25OQIQAO3LEFS62GDAQC
GRB4J4QKL4UDO5HUFA7IO3LI4OCMWRSMONUJF565R3ILCPJE2XGAC
JV27LDDKKY57IEBWGBFPSHEARMOEGLBYGBJD27PDPTNWWYXA4T6AC
if s.x == nil then return end
if slider.x0 == nil then return end -- slider uninitialized