Obstacle Avoiding Robot Circuit

This is an obstacle avoiding robot. In this i am showing my simulation of a robot which turns to the left when it senses and object in front of it within 15 cm. This is the virtual simulation which can be followed in real life and can be built .

Components required are :
1)Arduino uno -1
2) Bread board -1
3) L293D -1
4) motors -2
5) Ultrasonic sensor (HC SR04) -2

Make the following connections using the tinker cad software . Shown in the image

Assemble the following code blocks using the tinker cad software . Shown in the picture