3.4 Task 6-4: Change bar color

From Day 9

• Based on Task 6-3, change the color of the bars using RGB. Let red and green components be fixed at zero. Let the blue component be the corresponding data value times 10, which then is rounded to the nearest whole number (using Math.round())

• I still do not understand why we should put the codes in between "+ +". This is so difficult for me.