[Things] Arduino achieve traffic light design

1, equipment preparation:
the red line M5 the LED 1
Yellow M5 line the LED 1
green line M5 the LED 1
220 ohms resistor 3
breadboard a
breadboard Jumper 1 bar

2, the connection

3, as follows:

int redled =10; //定义数字10 接口
int yellowled =7; //定义数字7 接口
int greenled =4; //定义数字4 接口
void setup()
{
pinMode(redled, OUTPUT);//定义红色小灯接口为输出接口
pinMode(yellowled, OUTPUT); //定义黄色小灯接口为输出接口
pinMode(greenled, OUTPUT); //定义绿色小灯接口为输出接口
}
void loop()
{
digitalWrite(redled, HIGH);//点亮红色小灯
delay(1000);//延时1 秒
digitalWrite(redled, LOW); //熄灭红色小灯

digitalWrite(yellowled, HIGH);//点亮黄色小灯
delay(200);//延时0.2 秒
digitalWrite(yellowled, LOW);//熄灭黄色小灯

digitalWrite(greenled, HIGH);//点亮绿色小灯
delay(1000);//延时1 秒
digitalWrite(greenled, LOW);//熄灭绿色小灯

digitalWrite(yellowled, HIGH);//点亮黄色小灯
delay(200);//延时0.2 秒
digitalWrite(yellowled, LOW);//熄灭黄色小灯

digitalWrite(redled, HIGH);//点亮红色小灯
delay(0);//延时0 秒
digitalWrite(redled, LOW); //熄灭红色小灯
}

4, the effect of FIG.