Strumming is simple, just listen to the recording. 

 Intro:    G  G/Bb

G
If I had a Rainbow
To follow me where I go
          C
Everyone would like me
             G
Cause Id be so colorful


G
And if I had an apple
Whenever I was hungry 
                  C
Everyone would like me
                      G
Because Id share with them

           D
And if I could be a color itd be Ice cream 
          C
and if I could be an animal it?d be pink and green 
            D
I dont have to make sense
When Im living in a dream
C                                                      G
Dreamin is better when you dream along with me


Will you be my best friend 
Will you tell me secrets 
C
Will you share your markers
                          G
Will you build a fortress

Cause if I had a best friend Id want him to be like you 
C
Id want him to be like me 
                                G
because Id have a rainbow

G
And tell me can you whislte
can you cross you eyeballs 
      C 
do you beleive in whishes 
                          G
can you blow a bubble

          D
and if I could be a feeling Id be a summer swing
    C
if I could be a diamond youd wanna be my ring
            D
I dont have to make sense as long as i can sing
C                                          D
singing is better when you sing along with me

If I had a rainbow 
to follow me where Id go 
Everyone would like me 
Cause Id be so colorful

If I had a rainbow 
to follow me where Id go 
Everyone would like me 
Cause Id be so colorful

Everyone would like me 
Cause Id be so colorful