simplify drawing circle images (#1445)
simplify drawing circle images (#1445)

* simplify drawing circle images

add static

set default color to 0 0 0 0

remove lines

* fix img_weel_y

* use color macro
commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot