I've updated the cars to display two vertical yellow dots that serve as headlights or taillights. The dots are positioned on the left and right sides of each car and are vertically oriented, giving the vehicles a more distinctive appearance as they move across the road lanes.

I've updated the cars to have white headlights and added variety with different colored vehicles. Each car now randomly selects from a palette of six colors (red, blue, yellow, orange, purple, and green) when initialized, making the game more visually interesting while maintaining the classic Frogger gameplay.