1. This is one of the melodies you have already worked with. You have got the score and the corresponding percussion video. Use a xylophone or a glockenspiel to rehearse enough till you learn it by heart and can play it properly. 

2. The second step is to change the score. Substitute the dotted crotchets with three quavers, the value of the notes keeps on being the same but instead of a sound, there are going to be three.

Have you done it? Let's check if it is correct. Click on the question mark to see the score with the quavers.

3. It is time to follow the percussion. Watch the video and imitate it till you can perform it fluently. Here you have another example of variation by changing a rhythmic motif.