Keyestudio Smart Little Turtle Robot V3 Manual page 229

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}
void car_right()
{
digitalWrite(left_ctrl,LOW);
analogWrite(left_pwm,200);
digitalWrite(right_ctrl,HIGH);
analogWrite(right_pwm,200);
}
void car_Stop()
{
analogWrite(left_pwm,0);
analogWrite(right_pwm,0);
}
//the function that dot matrix shows patterns
void matrix_display(unsigned char matrix_value[])
{
for(int i=0; i<8; i++)
{
LEDArray[i]=matrix_value[i];
for(int j=7; j>=0; j--)
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