from machine import Pin, I2C
import time,ssd1306

oled = ssd1306.SSD1306_I2C(128, 64, I2C(0, scl=Pin(1), sda=Pin(0)))
r,g=Pin(15, Pin.OUT), Pin(14,Pin.OUT)

def show(msg, t):
    oled.fill(0)
    oled.text(msg, 35, 20)
    oled.text("Time: {}".format(t),25, 40)
    oled.show()

def light(rv,gv, start, end,step,msg):
    r.value(rv);g.value(gv)
    for i in range(start, end, step):
        show(msg,i)
        time.sleep(1)

while True:
    light(1,0,30,0,-1,"STOP")
    light(1,1,5,0,-1,"READY")
    light(0,1,30,0,-1,"GO")
    light(1,1,5,0,-1,"READY")