Gradient/Equalizer Icons

I need an icon similar to the icon that's attached. We will show this icon along with the items on our website that are for sale. We will pick the proper icon to show, based on several metrics.

General people viewing the listings on our website.

Check the attached file. We need something similar, but custom of course.
It can be a gradient of colors, like blue to red, or a rainbow, or all solid colors. We are not sure yet and want to see options.

Provide your entry with a mixture of rows so we can see what a mixed icon will look like.

To the left of each row, display this text:

Pre-Bids:
Watchers:
Voters:
Speed:
Views:

Therefore, there will be 5 rows.
The scale should be 0-6 (seven unique types):
0 (no color)
1
2
3
4
5
6 (maximum color)

The images should not be more than 62px tall and not more than 73 pixels wide.

Since there are 16,807 possible combinations of images to create , I do not expect the winner to do that. I will build them with a script. I just need you to provide the raw image and a raw set of gradients, and I will overlay them and render the images appropriately.

Therefore what I need from the winner is basically what each 0-6 should look like, in that gradient, like for 1 row, and I will build the rest using the pieces. If that is not clear please send me a PM or discuss in comments.