Xin Yen - Synthesizer - Fixed

import pygame
import play

# Backdrop colour
bk = play.new_image(image = 'vsbk.png', size = 175, x = 0, y = 0)

play.set_backdrop('light sky blue')


introduce2 = play.new_text(words='Press to play!', x=0, y=190, color = 'medium orchid')

cat = play.new_image(image = 'hello.png', x = 0, y = -200)

# BUTTONS
key_play_melody = play.new_box(color='light green', border_color='black', border_width=1, x=-100, y=-170, width=160, height=50)

kpm = play.new_text(words='play melody', x=-100, y=-170, font_size=20)

key_clear_melody = play.new_box(color='light yellow', border_color='black', border_width=1, x=100, y=-170, width=160, height=50)

kcm = play.new_text(words='clear melody', x=100, y=-170, font_size=20)

b_p = play.new_circle(x=-180, y=-100, radius=10)

txt_p = play.new_text(words='piano', x=-145, y=-100, font_size=20)

b_g = play.new_circle(color='blue', x=-80, y=-100, radius=10)

txt_g = play.new_text(words='guitar', x=-45, y=-100, font_size=20)

b_v = play.new_circle(color='blue', x=20, y=-100, radius=10)

txt_v = play.new_text(words='violin', x=55, y=-100, font_size=20)

b_f = play.new_circle(color='blue', x=120, y=-100, radius=10)

txt_f = play.new_text(words='flute', x=155, y=-100, font_size=20)

instrument = 0
instrument_buttons = [b_p, b_g, b_v, b_f]

@play.repeat_forever
def switch():
    for i in instrument_buttons:
        if i.is_clicked:
            global instrument
            instrument = instrument_buttons.index(i)
            for j in instrument_buttons:
                j.color = "blue"
            i.color = "black"


# Activate the for loop + lists

keys = []
sounds = [[], [], [], []]

for i in range(8):
    key_x = -180 + i * 50
    key = play.new_box(color='white', border_color='white', border_width=5, x=key_x, y=20, width=40, height=100)
    keys.append(key)     # Adds keys to the keys list
    p_sound = pygame.mixer.Sound("pia" + str(i+1)+ '.ogg')
    g_sound = pygame.mixer.Sound("git" + str(i+1)+ '.ogg')
    v_sound = pygame.mixer.Sound("vio" + str(i+1)+ '.ogg')
    f_sound = pygame.mixer.Sound("fl" + str(i+1)+ '.ogg')

    sounds[0].append(p_sound)
    sounds[1].append(g_sound)
    sounds[2].append(v_sound)
    sounds[3].append(f_sound)



melody = []

# This is the intro jingle that plays at the start of the program ✨

@play.when_program_starts
def start():
    pygame.mixer_music.load('hi-1.mp3')
    pygame.mixer_music.play()

# This is clearing the melody - delete all

@key_clear_melody.when_clicked
def clear():
    melody.clear()
    sound_clear_melody.play()

# Processing clicks - when button is clicked, what happens?

@key_play_melody.when_clicked
async def play_m():
    for i in range(len(melody)):
        await play.timer(seconds=0.5)
        sounds[instrument][melody[i]].play()

# Recording sounds - remembers the melody by adding it to the list

@play.repeat_forever
async def play_instrument():
    for i in range(len(keys)):
        if keys[i].is_clicked:
            keys[i].color = 'light grey'    # Changes to this
            sounds[instrument][i].play()
            await play.timer(seconds=0.3)
            keys[i].color = 'white'         # Go back to starting colour
            melody.append(i)

play.start_program()