I'm kind of confused by your question. Do you want a circle with a circumference of 1px or a circle with a 1px border?<BR><BR>The former sounds difficult, but for the latter, you can use the ...

Pi Day is celebrated today, 14 March, round the world. Pi (Greek letter π) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — ...