Frog Song

かえるの歌
The Frog's Song

かえるの歌が
kaeru no uta ga
The frog's song

聞こえてくるよ
kikoete kuru yo
we can hear it (the song)

ぐぁ ぐぁ ぐぁ ぐぁ
gwa gwa gwa gwa
ribbit <frog noise>

げろ げろ げろ げろ
gero gero gero gero
ribbit <more frog noise>

ぐぁ ぐぁ ぐぁ
gwa gwa gwa
ribbit <still more frog noise>

VOCAB:

かえる kaeru - Frog
の no - 's (possessive)
歌 uta - song
が ga - subject marker / particle

聞こえてくる kikoetekuru - able to hear gradually - (the feeling is we are approaching the frogs and their voices are getting louder.)
よ yo - 'hey you' or 'listen you!'

ぐぁ gwa & げろ gero - the effect of a frog singing

JUST A NOTE:
Another meaning of げろ gero is 'to throw up; puke'