Simple Schematic Drawing

Design and draw the schematic for a conventional hardwired circuit that will perform the following circuit functions using two break-make pushbuttons: - Turn on light L1 when pushbutton PB1 is pressed - Turn on light L2 when pushbutton PB2 is pressed, and - Electrically interlock the pushbuttons so that L1 and L2 cannot both be turned on at the same time. I have attempted something - the drawing is on the attachment.