Your toolkit
Everything on your car. The highlighted parts are the ones this mission needs.
SPIKE Hubthe brain · has a built-in gyroused this mission
2 Medium motorsleft + right wheels · ports A, Eused this mission
Large motorsteers the back · port Dused this mission
Large motorthe turret · port C · keep it centred, facing forwardnot needed
Distance sensorport B · port Bnot needed
Color sensorunderneath, pointing down · port Fused this mission
Hub gyrolevel-up: exact 90° turnsoptional level-up
Your car: the Delivery Cart with a large-motor turret carrying the distance sensor at the front, and a color sensor underneath. How to build it →
What the car must do
- Follow the black line with the belly color sensor — edge following.
- Steer in proportion to how far the reading is from the edge.
- Stop on the green tile and play a sound.
Line tracingProportional steeringColor sensor
Playbook cards for this mission: Follow the line · Green means go
Maze size
| Along the route | Whole maze |
|---|---|
| 3 → 2.2 → 3 → 2 → 2.5 lane widths | about 10.3 × 3.5 lane widths |
With a 30 cm lane width the maze is about 309 × 105 cm. Lane spacing is one lane width plus a wall.
Success looks like
- The car stays on the line through all four bends.
- It steers harder as the reading drifts further from the edge.
- It stops on green and plays its sound.