appendix fturtle methods method description turtle onrelease(funbtn= add=nonebind fun to mouse-button-release event on this turtle on canvas argumentsfun function with two argumentsto which will be assigned the coordinates of the clicked point on the canvas num number of the mouse-button defaults to (left mouse buttonturtle pencolor(*argsreturn or set the pencolor argumentsfour input formats are allowedpencolor(return the current pencolor as color specification stringpossibly in hex-number format (see examplemay be used as input to another color/pencolor/fillcolor call pencolor(colorstrings is tk color specification stringsuch as "redor "yellowpencolor((rgb)* tupleof rgand bwhich representan rgb colorand each of rgand are in the range colormodewhere colormode is either or pencolor(rgbrgand represent an rgb colorand each of rgand are in the range colormode if turtleshape is polygonthe outline of that polygon is drawn with the newly set pencolor example (for turtle instance named turtle)turtle pencolor('brown'tup ( turtle pencolor(tupturtle pencolor('# cc cturtle pendown(pull the pen down drawing when moving aliasespd down example (for turtle instance named turtle)turtle pendown(turtle pensize(width=noneset or return the line thickness aliaseswidth argumentwidth positive number this copy belongs to 'acha