This example shows how draw black and white, filled and line circles.
"Screen circle example" "lib/modules/standard.whl" "lib/modules/device.whl" "lib/modules/screen.whl" "EV3" proc main() ; Select the EV3 device in the simulator... selectDevice(DEVICE_EV3) ; Draw two black filled rectangles at the left/top and right/bottom... setFill(TRUE) setFillColor(BLACK) drawRect(0, 0, 89, 64) drawRect(89, 64, 89, 64) ; Draw a white line circle at the left/top... setFill(FALSE) setFillColor(WHITE) drawCircle(45, 32, 24) ; Draw a white filled circle at the right/bottom... setFill(TRUE) drawCircle(134, 96, 24) ; Draw a black filled circle at the right/top... setFillColor(BLACK) drawCircle(134, 32, 24) ; Draw a black line circle at the left/bottom... setFill(FALSE) drawCircle(45, 96, 24) updateScreen() ; Wait... halt() end